This is an image from this resource on the Internet4Classrooms' "Third Grade Math Skill Builders interactive help on standardized tests" resource page: Thinking Blocks. Solve multi-step word problems. Includes addition, subtraction, multiplication, division, ratio and proportion models
THINKING BLOCKS -- a suite of online learning tools to help students solve math word problems using brightly colored blocks. Students model mathematical relationships and identify known and unknown quantities with increasingly complex word problems.