Start practicing math story problems that deal with time passing by. Just make up your own. Begin really talking about what it means for 3 hours to pass by. Or, how many hours it is until dinner. Or, how long ago you were at Wal-mart. You get the idea. There are ALWAYS elapsed time questions on the big standardized tests at the end of the year. You'd be helping out a lot by practicing these at home.
Here are a couple of the most popular kinds of elapsed time questions.
Mr. Smith went shopping at 2:00 on Saturday with Mrs. Suzy. She browsed for 3 hours! What time was it when we finished shopping?
The cast of High School Musical started dance practice at 5:00. They finished practicing at 9:00. How many hours did the dancers practice?