Let me explain common core:

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Children were taught other methods to solve math problems such as drawing blocks in an array to represent 2x3=6. This is great to help kids understand various ways of solving a problem and gives children physical objects they can put together (manipulatives) to help connect math problems to real situations. The problem starts when they go to test kids. These idiots were actually forcing children to answer math problems in a particular way. They would say: draw an array to represent 2x3. So even if they know the right answer, they were forced to do all kinds of drawings to represent the data visually. There are some crazy common core drawings to represent place values like tens, hundreds. So kids get confused which of these visual representations to draw and end up getting answers wrong even though they know the numerical answer. Good riddance to this stupid bullshit.