ArtsNow
Arts Now Learning: What Is the Story of the Word Problem? [Pdf]
This lesson will assist students in visualizing and solving situations presented in word problems.
Khan Academy
Khan Academy: Adding Probabilities
Find four probabilities for each problem: P(A), P(B), P(A and B), and P(A or B). Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
NumberNut
Number Nut: Addition: Carrying
This lesson provides the rules for carrying values in addition by giving examples and the steps involved in the process.