Some of my favorites:
Math...Interactive Sites for Kids
Kids Kount--math games for kids
Math Cats--math games for kids
Math Games--list of links
Moneyville--fun, on-line role plays from the Moneyville touring exhibit. Become a neighborhood lemonade tycoon!
National Library of Virtual Manipulatives --incredible on-line activities for your kids -OR- a way for teachers to see how manipulatives can be used to increase mathematical understanding. Access activities by grade band: PreK-2, 3-5, 6-8, and 9-12. Mathematical strands include: Number and Operations, Algebra, Geometry, Measurement, Data Analysis and Probability.
Math...Lesson Plans and Resources for Teachers
How Much is a Million?--"These sites help students visualize what large numbers, such as one million, look like. There are online representations of a million, plus hands-on activities. Find out your age in millions of seconds. Includes lesson plans about the books by David Schwartz."
Investigations--Lessons from NCTM. (Nat'l Council of Teachers of Mathematics.)
Math Learning Center--Home of my favorite curriculum. Also lots of free on-line materials. (Including complete lesson plans with blackline masters, calendar markers to print, etc.)
Math Websites--Massive list of links.
Mathwire--Standards based activities.
Teacher Exchange--library of lesson plans by grade level from Math Forum @ Drexel.
Other Important Links...
Lesson Pathways--You join the website for free. Upon joining, you have access to "pathways" in every subject (science, history, reading/phonics, language arts, math), grades K-5. Read my review.
Salsa Spanish--search for "salsa" . For teaching activities, Google "WyFLES Salsa"
