Learning goals: Teacher Facing Comprehend the term “slope” to mean the quotient of the vertical distance and the horizontal distance between any two points on a line. Draw a line on a coordinate grid given its slope and describe (orally) observations about lines with the same slope. Justify (orally) that all “slope triangles” on one line are similar by using transformations or Angle-Angle Similarity. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 8.2 Dilations, Similarity, and Introducing Slope, Grade 8.