Bunch of word problems
http://www.criticalthinking.com/catalogsearch/advanced/result/?subject%5B%5D=121&product_type%5B%5D=390
DreamBox has good explanation if u get it wrong I like it. U can get it below
http://www.homeschoolbuyersco-op.org/math-supplemental/
Score for Beast Academy: 5
Score for Math Mammoth: 8
Score for Mathematical Reasoning: 5
Score for McRuffy: 0
Score for Miquon: 10
Score for RightStart: 8
Score for Saxon: 10
Score for Shiller: 5
Score for Singapore: 15
Score for Teaching Textbooks: 8
Concepts - CTC math & math Mamoth review, khan for missing stuff in CTC math
word problems Challenging WP from singapore math
online - prodigy, dream box
and TT during summer...
also use the tests from CLE math after a grade is done
love http://www.educationunboxed.com/
but CTC math really helps if u r behind...
you can zoom in on a topic and then work and work on it until it gets better
i did that with long division and TT Math .