Compare four sets of pattern blocks. Use pattern blocks to make different shapes. Warm up with a Mystery Math Mistake to tell whether Dotson's 10-frames represent a number less than his focus number.

My friend and teacher, Stanley Keleman, taught me a lot about making shapes. Formative psychology he calls it - shaping a life. I used to "think" my life was an effort of my mind alone. That's quite a ...

Special-section steel bars are hot-rolled bars that have been cold-drawn to a designer’s or manufacturer’s specifications. Usually they are given the cross-section and size of a part they will be used ...