Creative, flexible mathematics activities for the interactive whiteboard

London Grid for Learning

Number – number and place value

Objective Lesson
Count from 0 in multiples of 4, 8, 50 and 100; find 10 or 100 more or less than a given number 3NUM1 View lesson plan View interactive screens
Recognise the place value of each digit in a three-digit number (hundreds, tens, ones) 3NUM2 View lesson plan View worksheet View interactive screens
Compare and order numbers up to 1000 3NUM3 View lesson plan View worksheet View interactive screens
Compare and order numbers up to 1000 3NUM4 View lesson plan View interactive screens
Identify, represent and estimate numbers using different representations 3NUM5 View lesson plan View interactive screens
Read and write numbers up to 1000 in numerals and in words 3NUM6 View lesson plan View interactive screens
Solve number problems and practical problems involving these ideas 3NUM7 View lesson plan View interactive screens

Number – addition and subtraction

Objective Lesson
Add and subtract numbers mentally, including:
  • a three-digit number and ones
  • a three-digit number and tens
  • a three-digit number and hundreds
3NUM8 View lesson plan View interactive screens
Add and subtract numbers with up to three digits, using formal written methods of columnar addition and subtraction 3NUM9 View lesson plan View interactive screens
Add and subtract numbers with up to three digits, using formal written methods of columnar addition and subtraction 3NUM10 View lesson plan View interactive screens
Estimate the answer to a calculation and use inverse operations to check answers 3NUM11 View lesson plan View interactive screens
Estimate the answer to a calculation and use inverse operations to check answers 3NUM12 View lesson plan View worksheet View interactive screens
Solve problems, including missing number problems, using number facts, place value, and more complex addition and subtraction 3NUM13 View lesson plan View worksheet View interactive screens

Number – multiplication and division

Objective Lesson
Recall and use multiplication and division facts for the 3, 4 and 8 multiplication tables 3NUM14 View lesson plan View worksheet View interactive screens
Write and calculate mathematical statements for multiplication and division using the multiplication tables that they know, including for two-digit numbers times one-digit numbers, using mental and progressing to formal written methods 3NUM15 View lesson plan View worksheet View interactive screens
Write and calculate mathematical statements for multiplication and division using the multiplication tables that they know, including for two-digit numbers times one-digit numbers, using mental and progressing to formal written methods 3NUM16 View lesson plan View interactive screens
solve problems, including missing number problems, involving multiplication and division, including positive integer scaling problems and correspondence problems in which n objects are connected to m objects 3NUM17 View lesson plan View worksheet View interactive screens

Number – fractions

Objective Lesson
Count up and down in tenths; recognise that tenths arise from dividing an object into 10 equal parts and in dividing one-digit numbers or quantities by 10 3NUM18 View lesson plan View interactive screens
Recognise, find and write fractions of a discrete set of objects: unit fractions and non-unit fractions with small denominators 3NUM19 View lesson plan View worksheet View interactive screens
Recognise and use fractions as numbers: unit fractions and non-unit fractions with small denominators 3NUM20 View lesson plan View worksheet View interactive screens
Recognise and show, using diagrams, equivalent fractions with small denominators 3NUM21 View lesson plan View worksheet View interactive screens
Add and subtract fractions with the same denominator within one whole [for example, 5/7 + 1/7 = 6/7] 3NUM22 View lesson plan View worksheet View interactive screens
Compare and order unit fractions, and fractions with the same denominators 3NUM23 View lesson plan View interactive screens
Solve problems that involve all of the above 3NUM24 View lesson plan View interactive screens

Measurement

Objective Lesson
Measure, compare, add and subtract: lengths (m/cm/mm); mass (kg/g); volume/capacity (l/ml) 3MEA1 View lesson plan View interactive screens
Measure, compare, add and subtract: lengths (m/cm/mm); mass (kg/g); volume/capacity (l/ml) 3MEA2 View lesson plan View interactive screens
Measure, compare, add and subtract: lengths (m/cm/mm); mass (kg/g); volume/capacity (l/ml) 3MEA3 View lesson plan View interactive screens
Measure the perimeter of simple 2-D shapes 3MEA4 View lesson plan View worksheet View interactive screens
add and subtract amounts of money to give change, using both £ and p in practical contexts 3MEA5 View lesson plan View interactive screens
Tell and write the time from an analogue clock, including using Roman numerals from I to XII, and 12-hour and 24-hour clocks 3MEA6 View lesson plan View worksheet View interactive screens
Estimate and read time with increasing accuracy to the nearest minute; record and compare time in terms of seconds, minutes and hours; use vocabulary such as o'clock, a.m./p.m. 3MEA7 View lesson plan View worksheet View interactive screens
Know the number of seconds in a minute and the number of days in each month, year and leap year 3MEA8 View lesson plan View interactive screens
Compare durations of events [for example, to calculate the time taken by particular events or tasks 3MEA9 View lesson plan View worksheet View interactive screens

Geometry – properties of shapes

Objective Lesson
Draw 2-D shapes and make 3-D shapes using modelling materials; recognise 3-D shapes in different orientations and describe them 3GEO1 View lesson plan View interactive screens
Recognise angles as a property of shape or a description of a turn 3GEO2 View lesson plan View worksheet View interactive screens
Identify right angles, recognise that two right angles make a half-turn, three make three quarters of a turn and four a complete turn; identify whether angles are greater than or less than a right angle 3GEO3 View lesson plan View interactive screens
Identify horizontal and vertical lines and pairs of perpendicular and parallel lines 3GEO4 View lesson plan View interactive screens

Number - number and place value

Objective Lesson
Count in multiples of 6, 7, 9, 25 and 1000 4NUM1 View lesson plan View worksheet View interactive screens
Find 1000 more or less than a given number 4NUM2 View lesson plan View worksheet View interactive screens
Count in multiples of 6, 7, 9, 25 and 1000 4NUM3 View lesson plan View worksheet View interactive screens
Recognise the place value of each digit in a four-digit number (thousands, hundreds, tens, and ones) 4NUM4 View lesson plan View interactive screens
Order and compare numbers beyond 1000 4NUM5 View lesson plan View interactive screens
Order and compare numbers beyond 1000 4NUM6 View lesson plan View interactive screens
Identify, represent and estimate numbers using different representations 4NUM7 View lesson plan View worksheet View interactive screens
Round any number to the nearest 10, 100 or 1000 4NUM8 View lesson plan View worksheet View interactive screens
Solve number and practical problems that involve all of the above and with increasingly large positive numbers 4NUM9 View lesson plan View worksheet View interactive screens
Read Roman numerals to 100 (I to C) and know that over time, the numeral system changed to include the concept of zero and place value 4NUM10 View lesson plan View worksheet View interactive screens

Number – addition and subtraction

Objective Lesson
Add and subtract numbers with up to 4 digits using the formal written methods of columnar addition and subtraction where appropriate 4NUM11 View lesson plan View interactive screens
Add and subtract numbers with up to 4 digits using the formal written methods of columnar addition and subtraction where appropriate 4NUM12 View lesson plan View interactive screens
Estimate and use inverse operations to check answers to a calculation 4NUM13 View lesson plan View worksheet View interactive screens
Solve addition and subtraction two-step problems in contexts, deciding which operations and methods to use and why 4NUM14 View lesson plan View worksheet View interactive screens

Number – multiplication and division

Objective Lesson
Recall multiplication and division facts for multiplication tables up to 12 × 12 4NUM15 View lesson plan View worksheet View interactive screens
Use place value, known and derived facts to multiply and divide mentally, including: multiplying by 0 and 1; dividing by 1; multiplying together three numbers 4NUM16 View lesson plan View worksheet View interactive screens
Recognise and use factor pairs and commutativity in mental calculations 4NUM17 View lesson plan View interactive screens
Multiply two-digit and three-digit numbers by a one-digit number using formal written layout 4NUM18 View lesson plan View interactive screens
Solve problems involving multiplying and adding, including using the distributive law to multiply two digit numbers by one digit, integer scaling problems and harder correspondence problems such as n objects are connected to m objects 4NUM19 View lesson plan View interactive screens

Number – fractions (including decimals)

Objective Lesson
Recognise and show, using diagrams, families of common equivalent fractions 4NUM20 View lesson plan View worksheet View interactive screens
Count up and down in hundredths; recognise that hundredths arise when dividing an object by one hundred and dividing tenths by ten 4NUM21 View lesson plan View worksheet View interactive screens
Solve problems involving increasingly harder fractions to calculate quantities, and fractions to divide quantities, including non-unit fractions where the answer is a whole number 4NUM22 View lesson plan View interactive screens
Add and subtract fractions with the same denominator 4NUM23 View lesson plan View worksheet View interactive screens
Recognise and write decimal equivalents of any number of tenths or hundredths 4NUM24 View lesson plan View worksheet View interactive screens
Recognise and write decimal equivalents to ¼, ½, ¾ 4NUM25 View lesson plan View worksheet View interactive screens
Find the effect of dividing a one- or two-digit number by 10 and 100, identifying the value of the digits in the answer as ones, tenths and hundredths 4NUM26 View lesson plan View worksheet View interactive screens
Round decimals with one decimal place to the nearest whole number 4NUM27 View lesson plan View worksheet View interactive screens
Compare numbers with the same number of decimal places up to two decimal places 4NUM28 View lesson plan View worksheet View interactive screens
Solve simple measure and money problems involving fractions and decimals to two decimal places 4NUM29 View lesson plan View interactive screens
Solve simple measure and money problems involving fractions and decimals to two decimal places 4NUM30 View lesson plan View worksheet View interactive screens

Measurement

Objective Lesson
Convert between different units of measure [for example, kilometre to metre; hour to minute] 4MEA1 View lesson plan View interactive screens
Convert between different units of measure [for example, kilometre to metre; hour to minute] 4MEA2 View lesson plan View interactive screens
Measure and calculate the perimeter of a rectilinear figure (including squares) in centimetres and metres 4MEA3 View lesson plan View interactive screens
Find the area of rectilinear shapes by counting squares 4MEA4 View lesson plan View interactive screens
Estimate, compare and calculate different measures, including money in pounds and pence 4MEA5 View lesson plan View worksheet View interactive screens
Estimate, compare and calculate different measures, including money in pounds and pence 4MEA6 View lesson plan View worksheet View interactive screens
Read, write and convert time between analogue and digital 12- and 24-hour clocks 4MEA7 View lesson plan View worksheet View interactive screens
Solve problems involving converting from hours to minutes; minutes to seconds; years to months; weeks to days 4MEA8 View lesson plan View worksheet View interactive screens
Solve problems involving converting from hours to minutes; minutes to seconds; years to months; weeks to days 4MEA9 View lesson plan View worksheet View interactive screens

Geometry – properties of shapes

Objective Lesson
Compare and classify geometric shapes, including quadrilaterals and triangles, based on their properties and sizes 4GEO1 View lesson plan View worksheet View interactive screens
Identify acute and obtuse angles and compare and order angles up to two right angles by size 4GEO2 View lesson plan View worksheet View interactive screens
Identify lines of symmetry in 2-D shapes presented in different orientations 4GEO3 View lesson plan View worksheet View interactive screens
Complete a simple symmetric figure with respect to a specific line of symmetry 4GEO4 View lesson plan View worksheet View interactive screens

Number – number and place value

Objective Lesson
Read, write, order and compare numbers to at least 1 000 000 and determine the value of each digit 5NUM1 View lesson plan View worksheet View interactive screens
Count forwards or backwards in steps of powers of 10 for any given number up to 1 000 000 5NUM2 View lesson plan View interactive screens
Interpret negative numbers in context, count forwards and backwards with positive and negative whole numbers, including through zero 5NUM3 View lesson plan View worksheet View interactive screens
Round any number up to 1 000 000 to the nearest 10, 100, 1000, 10 000 and 100 000 5NUM4 View lesson plan View worksheet View interactive screens
Solve number problems and practical problems that involve all of the above 5NUM5 View lesson plan View interactive screens
Read Roman numerals to 1000 (M) and recognise years written in Roman numerals 5NUM6 View lesson plan View interactive screens

Number – addition and subtraction

Objective Lesson
Add and subtract whole numbers with more than 4 digits, including using formal written methods (columnar addition and subtraction) 5NUM7 View lesson plan View interactive screens
Add and subtract numbers mentally with increasingly large numbers 5NUM8 View lesson plan View interactive screens
Use rounding to check answers to calculations and determine, in the context of a problem, levels of accuracy 5NUM9 View lesson plan View worksheet View interactive screens
Solve addition and subtraction multi-step problems in contexts, deciding which operations and methods to use and why 5NUM10 View lesson plan View worksheet View interactive screens

Number – multiplication and division

Objective Lesson
Identify multiples and factors, including finding all factor pairs of a number, and common factors of two numbers 5NUM11 View lesson plan View worksheet View interactive screens
Identify multiples and factors, including finding all factor pairs of a number, and common factors of two numbers 5NUM12 View lesson plan View worksheet View interactive screens
Know and use the vocabulary of prime numbers, prime factors and composite (non-prime) numbers 5NUM13 View lesson plan View worksheet View interactive screens
Establish whether a number up to 100 is prime and recall prime numbers up to 19 5NUM14 View lesson plan View interactive screens
Multiply numbers up to 4 digits by a one- or two-digit number using a formal written method, including long multiplication for two-digit numbers 5NUM15 View lesson plan View interactive screens
Multiply and divide numbers mentally drawing upon known facts 5NUM16 View lesson plan View interactive screens
Divide numbers up to 4 digits by a one-digit number using the formal written method of short division and interpret remainders appropriately for the context 5NUM17 View lesson plan View worksheet View interactive screens
Multiply and divide whole numbers and those involving decimals by 10, 100 and 1000 5NUM18 View lesson plan View worksheet View interactive screens
Recognise and use square numbers and cube numbers, and the notation for squared (²) and cubed (³) 5NUM19 View lesson plan View interactive screens
Solve problems involving multiplication and division including using their knowledge of factors and multiples, squares and cubes 5NUM20 View lesson plan View worksheet View interactive screens
Solve problems involving multiplication and division including using their knowledge of factors and multiples, squares and cubes 5NUM21 View lesson plan View worksheet View interactive screens
Solve problems involving addition, subtraction, multiplication and division and a combination of these, including understanding the meaning of the equals sign 5NUM22 View lesson plan View interactive screens
Solve problems involving multiplication and division, including scaling by simple fractions and problems involving simple rates 5NUM23 View lesson plan View worksheet View interactive screens
Solve problems involving multiplication and division, including scaling by simple fractions and problems involving simple rates 5NUM24 View lesson plan View worksheet View interactive screens

Number – fractions (including decimals and percentages)

Objective Lesson
Compare and order fractions whose denominators are all multiples of the same number 5NUM25 View lesson plan View interactive screens
Identify, name and write equivalent fractions of a given fraction, represented visually, including tenths and hundredths 5NUM26 View lesson plan View worksheet View interactive screens
Recognise mixed numbers and improper fractions and convert from one form to the other and write mathematical statements > 1 as a mixed number [for example, ⅖ + ⅘ = 6/5 = 1⅕] 5NUM27 View lesson plan View worksheet View interactive screens
Add and subtract fractions with the same denominator and denominators that are multiples of the same number 5NUM28 View lesson plan View interactive screens
Multiply proper fractions and mixed numbers by whole numbers, supported by materials and diagrams 5NUM29 View lesson plan View worksheet View interactive screens
Read and write decimal numbers as fractions [for example, 0.71 = 71/100 ] 5NUM30 View lesson plan View worksheet View interactive screens
Recognise and use thousandths and relate them to tenths, hundredths and decimal equivalents 5NUM31 View lesson plan View worksheet View interactive screens
Round decimals with two decimal places to the nearest whole number and to one decimal place 5NUM32 View lesson plan View worksheet View interactive screens
Read, write, order and compare numbers with up to three decimal places 5NUM33 View lesson plan View worksheet View interactive screens
Solve problems involving numbers up to three decimal places 5NUM34 View lesson plan View worksheet View interactive screens
Recognise the per cent symbol (%) and understand that per cent relates to ‘number of parts per hundred’, and write percentages as a fraction with denominator 100, and as a decimal 5NUM35 View lesson plan View interactive screens
Solve problems which require knowing percentage and decimal equivalents of ½, ¼, ⅕, ⅖, ⅘ and those fractions with a denominator of a multiple of 10 or 25 5NUM36 View lesson plan View worksheet View interactive screens

Measurement

Objective Lesson
Convert between different units of metric measure (for example, kilometre and metre; centimetre and metre; centimetre and millimetre; gram and kilogram; litre and millilitre) 5MEA1 View lesson plan View worksheet View interactive screens
Understand and use approximate equivalences between metric units and common imperial units such as inches, pounds and pints 5MEA2 View lesson plan View interactive screens
Measure and calculate the perimeter of composite rectilinear shapes in centimetres and metres 5MEA3 View lesson plan View interactive screens
Calculate and compare the area of rectangles (including squares), and including using standard units, square centimetres (cm²) and square metres (m²) and estimate the area of irregular shapes 5MEA4 View lesson plan View interactive screens
Estimate volume [for example, using 1 cm³ blocks to build cuboids (including cubes)] and capacity [for example, using water] 5MEA5 View lesson plan View interactive screens
Solve problems involving converting between units of time 5MEA6 View lesson plan View interactive screens
Use all four operations to solve problems involving measure [for example, length, mass, volume, money] using decimal notation, including scaling 5MEA7 View lesson plan View interactive screens

Geometry – properties of shapes

Objective Lesson
Identify 3-D shapes, including cubes and other cuboids, from 2-D representations 5GEO1 View lesson plan View worksheet View interactive screens
Know angles are measured in degrees: estimate and compare acute, obtuse and reflex angles 5GEO2 View lesson plan View interactive screens
Draw given angles, and measure them in degrees (˚) 5GEO3 View lesson plan View interactive screens
Identify:
  • angles at a point and one whole turn (total 360˚)
  • angles at a point on a straight line and ½, a turn (total 180˚)
  • other multiples of 90˚
5GEO4 View lesson plan View interactive screens
Use the properties of rectangles to deduce related facts and find missing lengths and angles 5GEO5 View lesson plan View interactive screens
Distinguish between regular and irregular polygons based on reasoning about equal sides and angles 5GEO6 View lesson plan View interactive screens

Geometry – position and direction

Objective Lesson
Identify, describe and represent the position of a shape following a reflection or translation, using the appropriate language, and know that the shape has not changed 5GEO7 View lesson plan View interactive screens
Identify, describe and represent the position of a shape following a reflection or translation, using the appropriate language, and know that the shape has not changed 5GEO8 View lesson plan View worksheet View interactive screens

Number – number and place value

Objective Lesson
Read, write, order and compare numbers up to 10 000 000 and determine the value of each digit 6NUM1 View lesson plan View worksheet View interactive screens
Round any whole number to a required degree of accuracy 6NUM2 View lesson plan View worksheet View interactive screens
Use negative numbers in context, and calculate intervals across zero 6NUM3 View lesson plan View worksheet View interactive screens
Solve number and practical problems that involve all of the above 6NUM4 View lesson plan View worksheet View interactive screens

Number – addition, subtraction, multiplication and division

Objective Lesson
Multiply multi-digit numbers up to 4 digits by a two-digit whole number using the formal written method of long multiplication 6NUM5 View lesson plan View worksheet View interactive screens
Divide numbers up to 4 digits by a two-digit whole number using the formal written method of long division, and interpret remainders as whole number remainders, fractions, or by rounding, as appropriate for the context 6NUM6 View lesson plan View worksheet View interactive screens
Divide numbers up to 4 digits by a two-digit number using the formal written method of short division where appropriate, interpreting remainders according to the context 6NUM7 View lesson plan View worksheet View interactive screens
Perform mental calculations, including with mixed operations and large numbers 6NUM8 View lesson plan View worksheet View interactive screens
Identify common factors, common multiples and prime numbers 6NUM9 View lesson plan View worksheet View interactive screens
Use their knowledge of the order of operations to carry out calculations involving the four operations 6NUM10 View lesson plan View worksheet View interactive screens
Solve addition and subtraction multi-step problems in contexts, deciding which operations and methods to use and why 6NUM11 View lesson plan View worksheet View interactive screens
Solve problems involving addition, subtraction, multiplication and division 6NUM12 View lesson plan View worksheet View interactive screens
Use estimation to check answers to calculations and determine, in the context of a problem, an appropriate degree of accuracy 6NUM13 View lesson plan View worksheet View interactive screens

Number – fractions (including decimals and percentages)

Objective Lesson
Use common factors to simplify fractions; use common multiples to express fractions in the same denomination 6NUM14 View lesson plan View worksheet View interactive screens
Compare and order fractions, including fractions > 1 6NUM15 View lesson plan View worksheet View interactive screens
Add and subtract fractions with different denominators and mixed numbers, using the concept of equivalent fractions 6NUM16 View lesson plan View worksheet View interactive screens
Multiply simple pairs of proper fractions, writing the answer in its simplest form [for example, ¼ × ½= ⅛] 6NUM17 View lesson plan View worksheet View interactive screens
Divide proper fractions by whole numbers [for example, ⅓ ÷ 2 = ⅙] 6NUM18 View lesson plan View worksheet View interactive screens
Associate a fraction with division and calculate decimal fraction equivalents [for example, 0.375] for a simple fraction [for example, ⅜] 6NUM19 View lesson plan View worksheet View interactive screens
Identify the value of each digit in numbers given to three decimal places and multiply and divide numbers by 10, 100 and 1000 giving answers up to three decimal places 6NUM20 View lesson plan View worksheet View interactive screens
Multiply one-digit numbers with up to two decimal places by whole numbers 6NUM21 View lesson plan View worksheet View interactive screens
Use written division methods in cases where the answer has up to two decimal places 6NUM22 View lesson plan View worksheet View interactive screens
Solve problems which require answers to be rounded to specified degrees of accuracy 6NUM23 View lesson plan View worksheet View interactive screens
Recall and use equivalences between simple fractions, decimals and percentages, including in different contexts 6NUM24 View lesson plan View worksheet View interactive screens
Recall and use equivalences between simple fractions, decimals and percentages, including in different contexts 6NUM25 View lesson plan View worksheet View interactive screens

Ratio and proportion

Objective Lesson
Solve problems involving the relative sizes of two quantities where missing values can be found by using integer multiplication and division facts 6RP1 View lesson plan View worksheet View interactive screens
Solve problems involving the calculation of percentages [for example, of measures, and such as 15% of 360] and the use of percentages for comparison 6RP2 View lesson plan View worksheet View interactive screens
Solve problems involving similar shapes where the scale factor is known or can be found 6RP3 View lesson plan View worksheet View interactive screens
Solve problems involving unequal sharing and grouping using knowledge of fractions and multiples 6RP4 View lesson plan View worksheet View interactive screens

Algebra

Objective Lesson
Use simple formulae 6ALG1 View lesson plan View worksheet View interactive screens
Generate and describe linear number sequences 6ALG2 View lesson plan View worksheet View interactive screens
Express missing number problems algebraically 6ALG3 View lesson plan View interactive screens
Find pairs of numbers that satisfy an equation with two unknowns 6ALG4 View lesson plan View interactive screens
Enumerate possibilities of combinations of two variables 6ALG5 View lesson plan View worksheet View interactive screens

Measurement

Objective Lesson
Solve problems involving the calculation and conversion of units of measure, using decimal notation up to three decimal places where appropriate 6MEA1 View lesson plan View worksheet View interactive screens
Use, read, write and convert between standard units, converting measurements of length, mass, volume and time from a smaller unit of measure to a larger unit, and vice versa, using decimal notation to up to three decimal places 6MEA2 View lesson plan View worksheet View interactive screens
Convert between miles and kilometres 6MEA3 View lesson plan View worksheet View interactive screens
Recognise that shapes with the same areas can have different perimeters and vice versa 6MEA4 View lesson plan View worksheet View interactive screens
Recognise when it is possible to use formulae for area and volume of shapes 6MEA5 View lesson plan View worksheet View interactive screens
Calculate the area of parallelograms and triangles 6MEA6 View lesson plan View worksheet View interactive screens
Calculate, estimate and compare volume of cubes and cuboids using standard units, including cubic centimetres (cm³) and cubic metres (m³), and extending to other units [for example, mm³ and km³] 6MEA7 View lesson plan View interactive screens

Geometry – properties of shapes

Objective Lesson
Draw 2-D shapes using given dimensions and angles 6GEO1 View lesson plan View interactive screens
Recognise, describe and build simple 3-D shapes, including making nets 6GEO2 View lesson plan View worksheet View interactive screens
Compare and classify geometric shapes based on their properties and sizes and find unknown angles in any triangles, quadrilaterals, and regular polygons 6GEO3 View lesson plan View worksheet View interactive screens
Illustrate and name parts of circles, including radius, diameter and circumference and know that the diameter is twice the radius 6GEO4 View lesson plan View interactive screens
Recognise angles where they meet at a point, are on a straight line, or are vertically opposite, and find missing angles 6GEO5 View lesson plan View worksheet View interactive screens