My generation was the test subject for the prototype of what became "Common Core". In my area/time, I was doing normal math classes until about the middle of high school. Algebra 1, 2, 3, etc., geometry 1, 2, 3, etc., calculus 1,2, 3, etc.. But that was too neat and orderly. So they came up with this disastrous program known as "Integrated Math". The concept sounds good on paper, but in execution it fails absolutely. Instead of taking one semester to focus on gradually more complex specific areas of math, we began taking "Integrated Math 1, 2, 3, etc.". The idea was that, since all math is connected, that the students could be taught all of this shit at once. I can't remember any clear examples, but a part of one day's lesson would be.... Here's a triangle. What are the angles? And then using the angles, determine the dimensions of the triangle. So that's kind of tying algebra and geometry/trig into one lesson. I'm privileged to know the results for my specific class. **70% of my graduating class had to take remedial math courses when they went to college, because the Common Core prototype "Integrated Math" hamstrung us. Two classes before, where none of this bullshit was, only about 8% of the graduating class required remedial math courses.**THEY LITERALLY FAILED TO TEACH US MATH, AND FORCED US TO HAVE TO COMPENSATE BY RE-LEARNING IT THE PROPER WAY AS ADULTS- this is far more difficult than learning something correctly the first time. Turns out the lessons plans that had been developed by mathematicians, who are generally very methodical and precise (it's their fucking reason for being), might be the best way to teach math.