Here is a cool activity that my students did last week. It combines science and math and it was a hit! We got in all of our math and added in some great science observations all at the same time.
Step 1: Collect a variety of items, including: rice, beans, corn and potatoes. Choose some items that will expand when soaked and some items that won’t. (My class also did pasta, but it made for a stinky classroom – so be warned if you choose to use pasta, they look cool but they don’t smell cool.)
Step 2: Have students weigh each item and record the weight on a table.
Step 4: The next day, strain all of the items and and have students re-weigh the items.
Step 5: Talk about why some items absorb water and others don’t.