Free Presentations in PowerPoint format

Algebra scroll down (many, HS)  

Math Slide Shows - Algebra 

Algebra (many)

Algebra I powerpoints

Algebra I (many, Lompoc High School)

Algebra I Online (powerpoints, lessons, worksheets) 

Algebra II Online (powerpoints, lessons, worksheets)

Algebra II (many, Lompoc High School)

Algebra II

Algebra I & II powerpoints

See Also: Exponents, The Pythagorean Theorem, Linear Algebra

For Kids

So Many Games! (nlvm, K-12) 

Algebasics 

Algebra Games (Shodor Interactive)

Math Games

Linear Algebra 

Online Math Applications (Thinkquest winner!) 

Common Algebra Mistakes - Real Mistakes from Real Student Work

For Teachers

Algebra Review in 10 lessons Interactive 

Algebra I (interactive, lots!)

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Free Materials for Teachers