First graders were introduced to strategies for understanding and solving addition and subtraction problems with an unknown change this week. That is, they investigated problems in which a start number and result are known and used strategies to determine and understand the change, that is how many items were added or subtracted. Using the context of pennies in a "penny jar", shells in a bucket, or balls in the gym, athematicians must determine what they know in a problem and then determine what they are solving for. As important as an accurate solution, skills for interpreting this type of problem as an unknown change (rather than an unknown result) are being incorporated into instruction. A home edition of the Penny Jar Game is in Thursday folders this week to support this skill at home. Enjoy!
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