Ten Additional Annotated Online Resources
This mathematical tool could be used in an Algebra 1 classroom one students have students functions; linear functions in particular. Students will continue to use what they understand about slope and yintercepts while, at the same time, extending their knowledge to an understanding of restricted domain. Students can use this tool to model reallife situations and make the extension to piecewise functions with pieces from other families.
Highlight how symbolic operations on a system of linear equations do (or do not) change the graphic or tabular representations of the system.
Note that the System Solver is a tool intended to illustrate the rationale behind the symbolic operations used to solve systems of linear equations, and not a way to learn what procedures to follow. 
#2 System Solver

Need a pentagonal pyramid that's six inches tall? Or a number line that goes from ‑18 to 32 by 5's? Or a set of pattern blocks where all shapes have oneinch sides? You can create all those things and more with the Dynamic Paper tool. Place the images you want, then export it as a PDF activity sheet for your students or as a JPEG image for use in other applications or on the web.

#4 Dynamic Graph Paper

#5 Generating y = a sin x and

This resources uses a Flash interactive to investigate the shape of the curve y = a sin t and see what the concept of "amplitude" means. The sine curve occurs naturally when we are examining waves. The radius of the circle can change using a slider and affecting the graph.
