iQuest Cartridge: 6th-8th Grade 6th-8th Grade Math with One Cartridge Studying for math never felt so cool. Use this math cartridge with your iQuest handheld by LeapFrog and review over 14,000 questions from 68 common math textbooks. Simply scroll down until you find your textbook, click on it, and review material, chapter by chapter. Then take the chapter challenge or pop quiz to see how well you know the material. Includes 1 cartridges. Imported.