If you are looking for an engaging activity for place value, check out this I Have/Who Has game for numbers to the hundred thousands. The game includes 30 cards for those bigger classes and 3 printables with answer keys for assessments.
I Have/Who has is a great whole class game, but did you know it also makes a great workstation? Have the kids lay out all the cards face up in an array. They choose and pick up any card to start, read the Who Has question, and look for the card with the matching I Have. Have them set the used cards in a stack off to the side. If they play the game correctly, they should end up back at the first card they read.
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