As a reader discovered, The iTunes App Store offers downloads of several McGraw Hill game and story apps for free, as listed below. At up to $3 off, they're each at the lowest price we could find. The deals:

• Little Red Riding Hood for iPad (was $2)
• Why the Sea is Salty for iPad (was $2)
• Jack and the Beanstalk for iPad (was $2)
• Sail Through Math for iPhone, iPod touch, iPad (was $2)
• Grammar Wonderland (Primary) for iPad (was $3)
• see our entire list of free McGraw Hill iOS apps