At the start of this unit students learn about the difference between congruent and similar shapes. They use this knowledge to both perform and describe reflections, rotations, translations and enlargements on a grid. As learning progress they are challenged to describe a combination of transformations using the correct terminology.
How to introduce the sin, cos and tan trigonometric identities.
How to teach calculating the original amount after a percentage change.
The importance of the range when comparing comparing datasets.