Did you know that there is an excellent resource on the PBS website specifically designed for teachers of young children? You can choose the age group you work with and then choose from a drop-down list to see specific areas you want to investigate further. The categories are: The Arts, Health and Fitness, Math, Reading and Language Arts, Science and Tech, and Social Studies.
If you click on the Math link, you will find over 100 links to resources for teachers ranging from lesson plans and online activities to off-line activities and interactive opportunities. This is a pretty terrific website.
Check it out.