Lots of learners have heard that ‘two minuses make a plus’ but may not apply this rule correctly or have much sense of when or why it is the case. In this lesson, links are made to the science topic of electricity to help learners understand adding and subtracting directed (positive and negative) numbers.
For more KS3 maths lesson plans from Colin Foster click here.
Sign up here for your free Brilliant Teacher Box Set
Get 8 KS3/4 maths lessons with expert teaching techniques