12h 37min, aug 23, 2007 y - Concrete Operational Stage
Description:
in the second grade when we started learning more complex math, I was able to understand it. Although I was able to understand, I needed the help of these building block things to be able to see the work in front of me. This is due to the fact that I was able to understand conservation through the concrete operational stage.Added to timeline:
Date:
12h 37min, aug 23, 2007 y
Now
~ 18 years ago