by Charles Larrieu Casias | May 21, 2018 | Grades 6–8

By Charles Larrieu Casias The number line is an anchor representation that threads through the entire middle school curriculum. For this blog post, I want to focus on a creative use of the number line in grade 8 to explore scientific notation and irrational numbers....
by Ashli Black | May 7, 2018 | Grades 6–8

By Ashli Black The fact that a line has a well-defined slope—that the ratio between the rise and run for any two points on the line is always the same—depends on similar triangles. (p.12, 6–8 Progression on Expressions and Equations) As students are building their...