Natural Selection & Speciation Scaffolded Phenomena-Based Lesson: The Broken Ring: Ensatina Salamanders and the Fluid Boundaries of Speciation Presentation | Biology II | 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 Scaffolded Phenomena-Based Lesson in the Biology II (grades 9–12) chapter Natural Selection & Speciation, built around the phenomenon The Broken Ring: Ensatina Salamanders and the Fluid Boundaries of Speciation. This scaffolded version adds sentence frames and extra supports for students who need them. It is sold separately from the other two parts of the set.

Complete the set: Natural Selection & Speciation Scaffolded Phenomena-Based Lesson: The Broken Ring: Ensatina Salamanders and the Fluid Boundaries of Speciation Teacher Discussion Guide; Natural Selection & Speciation Scaffolded Phenomena-Based Lesson: The Broken Ring: Ensatina Salamanders and the Fluid Boundaries of Speciation Student Response Sheet. Original version: Natural Selection & Speciation Phenomena-Based Lesson: The Broken Ring: Ensatina Salamanders and the Fluid Boundaries of Speciation Presentation.

Sections: Section 1: Three-dimensional Learning Alignment (ngss); NGSS Dimension; Scaffolded Three-dimensional Learning Goal; Section 3: Scaffolded Science Talk Moves Matrix; Scaffolded Talk Move; Verbatim Facilitation Prompt & Talk Goal; Everyday Student Misconception (flawed Claim); Scientific Evidence & Intuitive Correction. Sample item: “Ensatina salamanders diverged into two lineages because the Central Valley acted as a ____________.”

What's inside: SCAFFOLDED Student Slide Show (editable .pptx + PDF, 16 slides).

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

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 Biology 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.