Studying to correct your errors about CGI types:

Note: these resources all use the CGI names, not the Common Core names

Common error: What to read or do

Confusing PPW-WU and JRU (ASU) (if you answered one and it should have been the other)

Use the resources from the two ways of looking at addition lesson

Confusing join (Add to) problems with separate (Take From) problems Use the resources from the addition and subtraction as actions lesson
Confusing change unknown, start unknown and result unknown (in Join or Separate) Watch about the different unknowns in this video on Join problems and this video on Separate problems
Confusing JCU (ACU) with SRU (TRU), PPW-PU or CDU Watch this
Confusing CQU and CRU Use the resources from the variations on compare problems lesson