To provide students with a meaningful real-world scenario in which one might use "counting on" as a method of adding, we read the book, 100th Day Worries by Margery Cuyler. In it, a student is asked to bring one hundred objects to class, in order to celebrate the one-hundredth day of school. She has trouble thinking of an object of which she can bring in one hundred, but her family helps her realize that she can bring smaller numbers of many different objects. She keeps adding on, until she reaches one hundred!
To provide a strong visual representation of the "counting on" strategy that our main character was using, we used the Splat Square on the SMARTboard. Students could add on with every new item she found, thus ensuring that she really did make it to one hundred!
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