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: the three-ray method, the Jigsaw of object positions, the practical focal-length link, examiner traps and differentiation.
Worksheet and answers
An 18-mark worksheet on ray diagrams, image nature, magnification and a practical check, with diagrams to read and a full worked answer key.
Slides
Your actual slides, presented right in the browser, with the site simulation linked beneath; the download is fully editable.
21st century skills activity
A Jigsaw of object positions with the four expert cards and the comparison table, with a full facilitation guide so it runs faithfully.
Send learners to the lesson online
This bundle pairs with the student topic page The converging lens, which walks through the three-ray method and the image cases, and with the site simulation Converging and Diverging Lenses, where moving the object across F and 2F shows the image change in real time.
Three rays, then every case
The lesson opens on a puzzle: one lens makes a large upright picture and a small inverted one. From there it builds the three predictable rays, each bent once at the lens line, so that any two locate the image and the third checks it.
The Jigsaw then splits the five object positions into expert roles, and every home group needs all four experts to complete the comparison table. The traps it pre-empts are the classic ones: bending rays twice, leaving off the ruler and arrows, and confusing the real image with the virtual one. The activity ships with a full facilitation guide so it can be run faithfully, including by a cover teacher.