Groundhog's Day Scavenger Hunt (need to print the questions & bookmark the sites) (The map activity at the bottom has a link to an online map of Gobbler's Knob. That online map is currently blocked. Until it is unblocked, you would have to print the map off from home or have your ETS print the map off for the kids to use.)
http://www.educationworld.com/a_lesson/hunt/hunt021.shtml
100 Day Ideas-Many are math (Use the "what totals $100.00" idea as a spreadsheet activity-You could take your kids to walmart.com, target.com, etc. and have them find items and prices …..then enter them into a spreadsheet you set up that totals them…upper grades you could even do a cell that would figure tax.)
http://www.globalclassroom.org/100days.html