Common Core is a cancerous disease affecting education. Mediocrity is the new norm for eductiion on the grade and high school levels. Mediocrity breeds lowering everything to that level - result failure of the system.
History is vital to good citizenship - now the Libs & leftist have rewritten it. The eradication of real history has been underway for some time. Eliminating math & science from the high school curriculum is criminal. However, even worse is looking at our colleges and universities - left leaning professors whose expertise is in social science are filling our children's heads with gallons of baloney.
Thank God, many parents are going to home schooling.