During this lesson (Introduction to forces) KS3 / Junior High students work through a variety of activities to develop their understanding of what is meant by an interaction pair. This is the 1st lesson from the 1a: Forces- Speed topic. Aimed at a mixed ability class (KS3 / Junior High) Presentation contains (22 slides)- Bell work activity Lesson objective and success criteria Information slides Challenge activities (group work)Practical activity (where appropriate)Demonstrate understanding task