@homerdog , did you read my pinned post?
http://talk.collegeconfidential.com/sat-act-tests-test-preparation/2164494-common-sense-tips-to-help-raise-your-sat-act-score.html#latest
This video about ACT math is excellent: https://www.youtube.com/watch?v=YjFRchAp6MM
Your D might be able to apply some of this to the SAT also.