This is an excellent source for explanation of what each of the standards of math educaton means. The standards as well as well as what should and shouldn't be stressed are well explained.
These Lesson Plans are a result of the Columbia Educational Center's summer workshop. They are all excelent lesson plans that can easily be implemented into high school math classes. They all are using manipulatives or an application to real life.
This lesson uses a cube coloring problem to show how things grow exponentially
Explores if the game "rocks, scissor, paper" is fair by expiremental and theoretical means - one weakness is the game is never explained.
works at solving problems leading to creating students own deductive reasoning problems.
This lesson involves creating tangram pieces and then using them to constuct different squares.
Uses a hose to find the greatest distance the water will go by expirementing with the angle
Uses paper "rulers" to let students discover significant digits.