Web Sites

http://www.mathacademy.com/pr/ Platonic Realms

Interesting site, with informative articles, some puzzles, etc. PP Mentors may appreciate Writing for a Math Class.

http://www.mathpuzzle.com/

Constantly updated with everything happening in recreational mathematics.

http://ucjeps.berkeley.edu/interchange

I love botany, and the best botany site on the internet is the Jepson Interchange, based on the Jepson Manual of California Flora. Among other great resources, it hosts the only large online botanical key anywhere, with links to an extensive database of plant photos to verify your species with.

All About Circuits

Really great site for information on electronics.

Saxon Math Placement Test

http://betterexplained.com/

Lessons to help you understand both basic and advanced math concepts.

https://www.khanacademy.org/

Excellent online math course.