This can be used for the 100th day of school or any day.
This is a set of 10 themed hundreds boards. They are 10x10 and have 100 pictures on each board. These are great for counting, adding, subtraction, etc. They can be great for checking mastery of counting numbers. They can make a great math center by having kids cover up the image as they count. Be creative in your use of them.
The board themes are:
pot of gold
Dr. Seuss inspired
For more creative lesson ideas, click on "elementary lesson plans" by my picture above.