Math Coach's Corner: New Hundred Chart Resource. Let me introduce you to Building a Wacky Hundreds Chart. It doesn't actually use a hundred chart! It's a cooperative activity that's done in a large circle on the floor using the number cards from the hundred chart, and it uses the hundred chart patterns (1 more, 1 less, 10 more, 10 less).
Math Coach's Corner: Recording Addition on a Hundred Chart. Here's a little freebie for showing addition on a hundred chart. There is one sheet with numbers included and another with spaces so you can add your own numbers. Then I created two more versions with space for kiddos to show their work on on open number line, like I've shown in the photograph below. Keep in mind that there is not a right way to show the work.