Geometric Modification & Trimming Tools Phenomena-Based Lesson: Hydraulic Flange Stress-Riser Cracking & Bolt Circle Misalignment Teacher Discussion Guide | Computer Aided Drafting I | 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 Computer Aided Drafting I (grades 9–12) chapter Geometric Modification & Trimming Tools, built around the phenomenon Hydraulic Flange Stress-Riser Cracking & Bolt Circle Misalignment. It is sold separately from the other two parts of the set.

Complete the set: Geometric Modification & Trimming Tools Phenomena-Based Lesson: Hydraulic Flange Stress-Riser Cracking & Bolt Circle Misalignment Presentation; Geometric Modification & Trimming Tools Phenomena-Based Lesson: Hydraulic Flange Stress-Riser Cracking & Bolt Circle Misalignment Student Response Sheet. Scaffolded version: Geometric Modification & Trimming Tools Scaffolded Phenomena-Based Lesson: Hydraulic Flange Stress-Riser Cracking & Bolt Circle Misalignment Teacher Discussion Guide.

Sections: Dimension / Standard; What Students Do; Iteea Stel; Slides; Segment; Focus Activity & Instructional Goal; Anchoring Driving Question (student Sensemaking):; Teacher Script (read Aloud To Introduce Phenomenon):. Sample item: “• Tier 1 Observation: Why do metal shafts, aircraft windows, and cast brackets crack at sharp 90-degree interior corners, and how does a curved FILLET arc spread out that force?”

What's inside: Teacher Discussion Guide (editable .doc + PDF, about 1,876 words, 7 pages); answer key / model answers for the teacher.

Standards: Aligned to ITEEA Standards for Technological and Engineering Literacy for Computer Aided Drafting I, with embedded engineering design practices and career-readiness skills.

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 Computer Aided Drafting I, 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.