Over 1000 lesson plans and units for math teachers! This website also includes what part of the standard course of study the lesson pertains too, as well as teacher feedback from the use of the lesson. I think this would be very useful if a teacher is struggling with a particular topic. They can come on this website and find a new way to explain a topic. This website also gives you questions that you can ask (sometimes higher level questions are difficult to come up with).

This website allows you to answer prompts. It would allow students free writes and they could use it to get to know their classmates. You can post these on Facebook and other blogs. This also might be beneficial to get to know people on your team or faculty. It could be a continuos learning process!

This website can be used to figure out conversions with the online calculator. There are some interesting calculators that could be used with different types of problems involving science. This page also has math tricks for age and days of the year. It could be used in something as simple as a last minute note to keep the students guessing until the next day!

This website lists many links so that you can explore lesson plans. They list many different activities that you can do with your students. It also lists puzzles and games. If you are struggling with how to connect with your students on a particular topic then you might want to check out this site!

Purplemath contains practical algebra lessons demonstrating useful techniques and pointing out common errors. Lessons are written with the struggling student in mind, and stress the practicalites over the technicalities. Links and other resources also available.

Coolmath has a ton of cool math games and puzzles, lots of really clear math lessons (arithmetic, fractions, decimals, algebra, etc.), fractals, geometry, tessellations and more. Tons of very cool math stuff for kids, teens, parents and teachers too!