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Description:
 Count the number of shaded squares.
  
 Adaptive Learning Progression: Up to 10 squares, then up to 100, then beyond 100.  | 
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Sample Levels (out of 6)
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 Count the number of shaded squares.  | |
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 Count the number of shaded squares.  | |
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 Count the number of shaded squares.  | |
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 Count the number of shaded squares.  | 
