Laser Cutting & Sheet Assembly Phenomena-Based Lesson: The Loose Rattling Finger-Joint Box & The Corroded PVC Laser Optics Disaster Teacher Discussion Guide | Engineering Design | 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 Engineering Design (grades 9–12) chapter Laser Cutting & Sheet Assembly, built around the phenomenon The Loose Rattling Finger-Joint Box & The Corroded PVC Laser Optics Disaster. It is sold separately from the other two parts of the set.

• What's inside: Teacher Discussion Guide (editable .docx + PDF, about 2,291 words, 8 pages); answer key / model answers for the teacher.
• 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 Engineering Design, grades 9–12.

Sample question“• Tier 1 Observation: Why did drawing a 10.00 mm tab and a 10.00 mm slot in CAD produce a loose joint with a 0.25 mm clearance gap after laser cutting?”

Complete the set: Laser Cutting & Sheet Assembly Phenomena-Based Lesson: The Loose Rattling Finger-Joint Box & The Corroded PVC Laser Optics Disaster Presentation; Laser Cutting & Sheet Assembly Phenomena-Based Lesson: The Loose Rattling Finger-Joint Box & The Corroded PVC Laser Optics Disaster Student Response Sheet. Scaffolded version: Laser Cutting & Sheet Assembly Scaffolded Phenomena-Based Lesson: The Loose Rattling Finger-Joint Box & The Corroded PVC Laser Optics Disaster Teacher Discussion Guide.