Gear Trains & Torque Ratios Phenomena-Based Lesson: The Smoking Stalled Winch Motor, The Cancelled Idler Gear & The Self-Locking Worm Elevator Presentation | Introduction to Technology and Engineering | Grades 9–12

This is the student-facing slide presentation that introduces the phenomenon, walks the class through observations and driving questions, and frames the evidence students will use for the Phenomena-Based Lesson in the Introduction to Technology and Engineering (grades 9–12) chapter Gear Trains & Torque Ratios, built around the phenomenon The Smoking Stalled Winch Motor, The Cancelled Idler Gear & The Self-Locking Worm Elevator. It is sold separately from the other two parts of the set.

Complete the set: Gear Trains & Torque Ratios Phenomena-Based Lesson: The Smoking Stalled Winch Motor, The Cancelled Idler Gear & The Self-Locking Worm Elevator Teacher Discussion Guide; Gear Trains & Torque Ratios Phenomena-Based Lesson: The Smoking Stalled Winch Motor, The Cancelled Idler Gear & The Self-Locking Worm Elevator Student Response Sheet. Scaffolded version: Gear Trains & Torque Ratios Scaffolded Phenomena-Based Lesson: The Smoking Stalled Winch Motor. The Cancelled Idler Gear & The Self-Locking Worm Elevator Presentation.

Sections: Dimension / Standard; Performance Expectation & Practices Alignment; Slides; Segment; Focus Activity & Instructional Goal; Anchoring Driving Question (student Sensemaking):; Teacher Script (read Aloud To Introduce Phenomenon):; Talk Move Category. Sample item: “• Tier 3 Transfer: Why can a heavy load easily back-drive a spur gear train when power is cut, whereas a Worm Gear Drive is mechanically self-locking (anti-backdrive)?”

What's inside: Student Slide Show (editable .pptx + PDF, 22 slides).

Standards: Aligned to ITEEA Standards for Technological and Engineering Literacy for Introduction to Technology and Engineering, with embedded engineering design practices and career-readiness skills.

Resource type: Phenomena-Based Lesson – Presentation. Format: editable Microsoft PowerPoint 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 Introduction to Technology and Engineering, 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.