The problem is that the Common Core idiots don’t reallize that children do NOT think abstractly.
That doesn’t happen until teen age years.
Children not yet in puberty are concrete thinkers.
That is absolutely correct. When students begin to be able to think in abstract terms varies by child but it has a profound effect on their ability to learn mathematics. Some cannot do it until they are 15 or 16, others can do it when they are 12 or 13. Seldom does the ability develop before then.
re: Common Core. Piaget must be rolling over in his grave