Every part, two ways
Each part of the bundle opens right here on the site, projectable in any browser, and downloads as an editable file, never a locked PDF. Adapt them to your set, your timing and your school's calendar.
Lesson plan
The 60-minute plan, with the principle and its condition, the Newton's-third-law link, collisions and explosions, elastic versus inelastic, three worked examples, examiner traps and differentiation.
Worksheet and answers
Original AS questions across recall, an inelastic collision, an explosion, an elastic-or-inelastic test and reasoning, with a full worked answer key.
Slides
Your actual slides, presented right in the browser, with the live simulation linked beneath; the download is fully editable.
21st century skills activity
A Connect-Extend-Challenge routine with a response sheet and teacher model responses, plus the PIES rationale and a facilitation guide, so it runs faithfully.
Send learners to the lesson online
This bundle pairs with the student topic page Conservation of momentum, which carries the interactive explanation, and with the site simulation Conservation of Momentum, which lets learners set the masses and velocities and watch the total momentum stay the same through a collision.
Always momentum; only sometimes energy
The hardest idea here is that momentum is always conserved while kinetic energy may not be. The lesson holds a sign convention through every collision and uses the sticking-trolleys model so the difference between an elastic and an inelastic collision is concrete, not just a rule.
The Connect-Extend-Challenge routine then consolidates the whole dynamics topic and surfaces the deep energy question for each learner to name. It ships with the response sheet and teacher model responses, so it can be run faithfully.