engaging math activities

Hi all

I need some engaging math activities/games for small/whole group to reinforce number sense in grades k-4.

Does anyone have ideas or even a good book I could use?

 

Some ideas here:

http://www.mathsolutions.com/documents/1997_Number_Sense.pdf

 

Thanks so much! I'll print it out. Keep those great ideas and suggestions coming. I need as much as I can get!

 

Marilyn Burns videos/book

Hi all again,

Thanks Czacza for the MB article. I am now interested in obtaining more videos/books from her. However, they are expensive! Does anyone have an idea where I can get them cheaply?
Thanks!

 

These are two of my favorite sites:

http://mathwire.com/

http://letsplaymath.wordpress.com/2008/09/22/things-to-do-hundred-chart/

These have great ideas and lots of printables.