Based on the Parents' Choice Award-winning bookDo you quake when your teacher says, "Now it's time for grammar"? Do you misplace your modifiers? Do your verbs agree with your subjects?    Fear no more! A big Hollywood producer and a famous movie star will help you learn all those nasty elements of grammar: parts of speech, agreement, modifiers, and more - in a downright entertaining way. There might even be some dinosaurs, twisters, and explosions along the way. All you have to do is pop these Grammar Smart Junior cassettes into a tape player and listen up.    You'll be amazed at how quickly you learn, and how much fun it can be. You'll finally know your grammar backwards and forwards, and you'll never have to worry about it again!    Based on the popular Princeton Review book, Grammar Smart Junior cassettes are designed for kids in grades six to eight. And if you want to learn some choice new words, try Word Smart Junior cassettes, too.