Even though it seemed that there was little data to drive the implementation of Common Core, big money folks like Bill Gates along with many elected and appointed officials, as well as educational experts were all more than willing to jump on the CC train. They all appeared to have romantic notions that their progressive ideas would change the face of education in America. I am attaching some recent articles addressing the issue.

Math Readiness Drops to 14-Year Low among US High School Graduates, According to ACT 2018 Report

http://leadershipblog.act.org/2018/10/math-readiness-drops-to-14-year-low.html

Bill Gates Tacitly Admits His Common Core Experiment was a Failure

http://thefederalist.com/2017/10/25/bill-gates-tacitly-admits-common-core-experiment-failure/

Gates admits Common Core failure, then doubles down on it

https://www.philanthropydaily.com/gates-philanthropy-failure-common-core/

Bill Gates- Our education efforts are evolving

https://www.gatesnotes.com/Education/Council-of-Great-City-Schools?WT.mc_id=10_19_2017_10_CGCS2017_GF-TW_&WT.tsrc=GFTW&sf66013815=1

https://www.watchdog.org/national/op-ed-the-dumbing-down-of-america/article_61f64000-f181-11e8-a22e-6bd70b62cd6c.html

https://thefederalist.com/2018/11/05/9-years-common-core-test-scores-indoctrination/