“Fractional Lengths in Triangles and Prisms” from IM Grade 6 by Open Up Resources and Illustrative Mathematics.
“Triangles with 3 Common Measures” from IM Grade 7 by Open Up Resources and Illustrative Mathematics.
“Drawing Triangles (Part 2)” from IM Grade 7 by Open Up Resources and Illustrative Mathematics.
“Drawing Triangles (Part 1)” from IM Grade 7 by Open Up Resources and Illustrative Mathematics.
“Finding Side Lengths of Triangles” from IM Grade 8 by Open Up Resources and Illustrative Mathematics.
In the lesson, Lewis re-engages fourth-grade students after an initial experience the week prior, which was focused on classifying and categorizing triangles.