This Let's Make a Trade lesson plan also includes:
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First graders use ten sticks and ones blocks to count and group blocks in ones and tens. They are explained that they are going to play a trading game. Students are told that in our number system, no column or "place" can hold more than nine pieces. Students are explained that as soon as 10 pieces are placed in a column, he or she has to "trade" for a peice in the next column to the left.