In Common Core math, it often is not good enough to get the correct answer. Instead, students are required to show “higher order” thinking skills — in this case, use of the associative property. Yes, the associative property is important and should be taught at some point. Unfortunately, we suspect that many 7-year olds will not be able to understand this particular assignment. With limited days in the school year, wouldn’t second graders — second graders! — be better off spending their time attempting to master the traditional subtraction algorithm?
@smheath11 @Talkmaster Friendly numbers? Why not do the problem with the numbers given – how hard is to "borrow" ten and subtract 9 from 12
— David Schaab (@schaabdl) March 25, 2014
@smheath11 @Talkmaster Math standards written by people who've never taught K-12 math. #stopcommoncore
— This Guy (@FL_bailbondsman) March 25, 2014
@smheath11 unbelievable! Why not teach it right2start with? Why add extra confusing instructions? Parents n my State r protestn. Good luck
— Ann Johnson (@annmjs) March 25, 2014
@smheath11 @Talkmaster They are teaching the next generation of tax payers. Round up and make your donation. #CommonCore
— Dennis (@djack427) March 25, 2014
https://twitter.com/satillared/status/448441406235750400
@smheath11 @Talkmaster I survived govt schools, but that was back when you learned MATH. Whatever this is is crazy! Cath Sch for our kids!
— JaimeLRTo (@JaimeLRTo) March 25, 2014
@smheath11 @Talkmaster What a convoluted.way to teach math….
— M_AG_A (@SpreadsheetAg) March 25, 2014
https://twitter.com/sher2417/status/448281565609881600
@smheath11 @Talkmaster Home school
— Brad Cavendish (@brad_cavendish) March 25, 2014
Update:
In case you were wondering, the use of the term “friendly numbers” by the teacher above bears no relation to the use of the same term in number theory.
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