More applicable to secondary teachers, here is another site which is great for math exploration.

# Category: Math

# Metta — Storytelling + Polling In One Compact Format.

Looking for a fresh new lesson presentation platform? This may suit you. It looks neat to me, and the adding of Polls for feedback is a great idea.

# Wolfram Problem Generator: Unlimited Random Practice Problems

High School Math, you say? How about this! Great for generating problems and helping students solve them sequentially.

Wolfram Problem Generator: Unlimited Random Practice Problems.

# Library on Wheels

What a great classroom idea!

# SchoolsWorld

An interesting new multidisciplinary school website concentrating on multimedia content.

# A sortable database of educational resources

Here is a collection of resources, both online and offline.

# TenMarks

Did you pick up a math course this fall and need a few extra resources for your high flyers and lower learners? Give this one a try.