6 St. 28 Min, 23 Jun 2008 Jahr - When I was in 2nd grade I would use my fingers to add and subtract during a math problem.
Beschreibung:
 This shows Concrete Operational Stage, because during this stage kids start to apply logic and they need to use their fingers as hand on examples. 
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6 St. 28 Min, 23 Jun 2008 Jahr
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 ~ 17 years ago 
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