5 hours

Year 9 Extension

Spring Term

Unit 12

Transformations; Fractions, decimals, percentages, ratio and proportion; Measures and mensuration

NNS 202–217, 242–247

Autumn Term

Spring Term

Summer Term

Support (from Y9 teaching programme) • Enlarge 2-D shapes, given a centre of enlargement and a whole number scale factor, on paper and using ICT; identify the scale factor of an enlargement as the ratio of the lengths of any two corresponding line segments; recognise that enlargements preserve angle but not length, and understand the implications of enlargement for perimeter • Use and interpret maps and scales drawings
Core (from Y9 objectives for able pupils) • Understand and use proportionality and calculate the result of any proportional change using multiplicative methods • Know that if two 2-D shapes are similar, corresponding angles are equal and corresponding sides are in the same ratio • Enlarge 2-D shapes, given a fractional scale factor; recognise the similarity of the resulting shapes; understand the implications of enlargement for area and volume • Begin to use sine, cosine and tangent in right-angled triangles to solve problems in two dimensions

Starters	Main	ICT	Scaffolding	Key Questions	Notes
~ Demonstrate how enlarging a shape twice with negative scale factors, gives a positive result. Link this with multiplying two negative numbers.	BOLT 101MP: ~ 85 Making maps; 86 Mathematics in Geography 89 Crystals MAP ~ Enlarging Areas ~ Shape work ideas : Two maps, one twice the scale of the other, placed on top of each other. How do you find the one point which corresponds on both maps? TASK MATHS 3 ~ What is Trigonometry?	HORN, Cornwall ~ Combinations of transformations			MAP – Level Ladders ~ Transformations