Post date: Mar 22, 2013 12:37:26 PM
Thinking Blocks - Ratio Word Problems
http://www.thinkingblocks.com/ThinkingBlocks_Ratios/TB_Ratio_Main.html
This is an excellent modeling site that teaches how to solve word problems involving ratio, proportion, multi-step problems, and algebraic situations. For each type of word problem, there is a narrated video that shows how to model and solve that sort of problem using virtual "Thinking Blocks". Then randomly generated problems of that type are presented. The student then gets to model and solve the problem, while getting feedback, guidance, and reinforcement at each step. The problem types cover Part-Part Ratios, Comparing Three Quantities, Part-Total Ratios, and Advanced Problems. A final section shows how draw these models on paper to apply these techniques when no longer at the site. These are all concepts we've gone over in math this year.
(Requires Flash)