Khan Academy
Khan Academy: Rational Number Word Problems
Practice solving multi-step word problems. The numbers in these problems may be fractions, decimals, and percents. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Purple Math
Purplemath: "Work" Word Problems
Explains the "trick" to "work" word problems (such as two people painting a room, or two pipes filling a tank), and demonstrates how to set up and solve these exercises.
Illustrative Mathematics
Illustrative Mathematics: 7.ee Who Is the Better Batter?
Seventh graders compare the batting averages of two baseball players in this lesson.