9th Grade Math Practice Questions to test addition, multiplication, word-problem skills, and basic algebraic skills. Includes answers and explanations. From the Proficiency Building Activities of the NASA Lewis Research...

Optimization has roots in operations research, and this collection of tutorials from IFORS Educational Research Committee covers many topics within OR. A fun applet requires the user to place as many queens on a chess...

Created by Lang Moore and David Smith for the Connected Curriculum Project, the purpose of this module is to study the process of moving from rate-of-change information to cumulative change; to relate this process to...

Created by Lang Moore and David Smith for the Connected Curriculum Project, this is a module to study the process of moving from rate-of-change information to cumulative change; to relate this process to area...

This series of videos, created by Salman Khan of the Khan Academy, features topics covered from very basic algebra all the way through algebra II. This is the best algebra playlist to start at if you've never seen...