
People who developed common core standards had to demonstrate the difference between the new and the old standards (to justify money spent), that is why the mix simple math kids need to lear and something they call “fundamental computer science concept”, for which students should be taking a different subject with different learning strategies. Mixing together things which have different learning goals and thinking patterns just confuses kids and has nothing to do with effective teaching. (more at http://teachology.xyz/3r.htm)