Students learn how to round a number to a significant figure. They use this knowledge to estimate solutions by rounding and finding the limits of accuracy of rounded numbers. As learning progresses they are challenged to calculate the upper and lower bounds in calculations. This topic takes place in Year 10 Term 2 and follows fractions and decimals.
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.