We just (finally) completed one of my favorite Hundreds Day tasks. I got this idea from Mathwire a million years ago (really). First, I gave each child an empty hundreds grid and their job was to write their name over and over to fill that chart. Then they picked one color and colored ONLY the capital letter in their name whenever it appeared on the chart. For example, Mike's name begins with M so he colored every M on his chart.
Then comes the really cool part. Once everyone is finished, they look at the pattern that is made on their chart and see if they can find anyone else with that same pattern. If (when) they do, their job is to figure out WHY their patterns are the same. Here are some of the patterns:
...and here are two girls with the exact same pattern:
Sometimes it takes my students awhile to figure out why some patterns are the same and some are different. But once they figure it out, they have that beautiful aha moment and they go a little crazy running from group to group to check out their theory. In case you have never done anything like this before, I will let you figure out why each pattern turns out the way it does. I so love math! Problems like this make me smile because of the beauty of our number system. (I am a geek, aren't I?!?)