National Council of Teachers of Mathematics
The Math Forum: Lines and Slope: Chameleon Graphing
Join Joan the chameleon in an exploration of lines and slope. You'll be drawing lines, calculating slope, using equations and more!
Curated OER
Graphing Calculator T1 81 Click to Enlarge
This Smithsonian article traces the teaching of math in America through "Slates, slide rules, and software." Includes sections on The Early Republic, The World Stage, The Cold War, The Information Age, and Resources.