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Penguin pairs - Count the penguins.
Click on the "+" symbol to add a penguin. Click on the "-" symbol to remove a penguin.
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Lots of penguins 1 and 2. - Students count the number of penguins and explain the strategy used when counting the number of penguins. Click and drag the penguins to make groups. Click and drag a penguin behind another one to hide a penguin.