Geometric Optics & Lenses Phenomena-Based Lesson: The Bench Where the Image Would Not Keep Step: Thin-Lens Distances Teacher Discussion Guide | Physics II | Grades 9–12

This is the teacher discussion guide, with lesson flow, facilitation questions, anticipated student ideas and model explanations for leading the class discussion for the Phenomena-Based Lesson in the Physics II (grades 9–12) chapter Geometric Optics & Lenses, built around the phenomenon The Bench Where the Image Would Not Keep Step: Thin-Lens Distances. It is sold separately from the other two parts of the set.

Complete the set: Geometric Optics & Lenses Phenomena-Based Lesson: The Bench Where the Image Would Not Keep Step: Thin-Lens Distances Presentation; Geometric Optics & Lenses Phenomena-Based Lesson: The Bench Where the Image Would Not Keep Step: Thin-Lens Distances Student Response Sheet. Scaffolded version: Geometric Optics & Lenses Scaffolded Phenomena-Based Lesson: The Bench Where the Image Would Not Keep Step: Thin-Lens Distances Teacher Discussion Guide.

Sections: Standards Alignment; Student Learning Objectives (slos); Dated Observations; The Data Tables; The Graphs; Sensemaking Questions; What Strong Answers Include (teacher Notes); The CER Task (verbatim). Sample item: “From d_o = 15.0 cm to d_o = 30.0 cm, how far and which way did d_o move? How far and which way did d_i move?”

What's inside: Teacher Discussion Guide (editable .docx + PDF, about 2,089 words, 6 pages).

Standards: NGSS High School Physical Science (HS-PS) disciplinary core ideas and the science practices of analyzing data and constructing explanations.

Resource type: Phenomena-Based Lesson – Teacher Discussion Guide. Format: editable Microsoft Word file plus a ready-to-print PDF.

Classroom use: Open with the phenomenon slide show, let students record ideas on the response sheet, and lead the discussion with the teacher guide. Built for Physics II, grades 9–12.

Format note: These files are delivered in Microsoft Office formats (Word and/or PowerPoint). If you open a worksheet that includes tables in Apple Pages or another non-Microsoft app, table formatting may not display correctly. For best results, use Microsoft Word or PowerPoint (or upload the file to Google Docs). If you run into any formatting issues, contact us and we can send a PDF version.