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 45-minute plan, with the particle model, examiner traps and a timing and contingency note.
Worksheet and answers
Six original questions and a full worked answer key with marking notes.
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 printable prediction card for Think-Pair-Share, Solver and Coach role cards, and eight Rally Coach problem cards with the checking answer on each.
Visual first, and built to be talked through
The bundle is anchored to one picture: two cubes of equal volume, steel and aluminium, where the denser material has heavier particles that also sit more closely packed. Calculation and floating are then read off the same model, so the maths and the reasoning stay joined up.
The main practice runs as Rally Coach, where one partner solves out loud while the other checks each line, then they swap. Structured talk like this gives English-as-an-additional-language learners a route into the physics, and random call after the task keeps every learner accountable.