6 h 28 m, 23 jun 2008 año - When I was in 2nd grade I would use my fingers to add and subtract during a math problem.
Descripción:
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.Añadido al timeline:
fecha:
6 h 28 m, 23 jun 2008 año
Ahora mismo
~ 17 years ago