Contains all learning levels — no in-app purchases required! The US History Game For Kids app lets you practice facts about US history that are typically part of the curriculum for kids and students in 6th through 8th grade. This is a fun way to practice history facts in an interactive quiz format and learn a lot about American history. U.S. History Quiz Features: - Correct answers are highlighted if students get answers wrong - The US History questions get progressively harder - Option to adjust level of difficulty - Smart Learning review levels offer practice to make learning really stick - Kids win medals and points for completing educational sections of the quiz - Fully integrated in Game Center with seven educational achievements - Play the first five levels for free up to the Bronze medal - Option to purchase additional levels with new learning questions Practicing the questions on this US History quiz game will not only teach important educational facts, but also make it easier to complete the games on the fun online learning sites Always-Icecream.com and Clever-Dragons.com, where kids earn virtual currency for each level they complete. With this currency, children can unlock fun and creative games.