Like Khan Academy, Duolingo Math is free. The app is available on iPhone, iPad and some iPod Touch devices and it's only in English for now. The company hasn't revealed when it will be available ...

Once you complete the quiz, you can see how your score compares to yours peers, get the correct answers with detailed explanations, and be provided with additional readings and resources on the topic.

“If the student doesn’t know 3 times 7, we may want to ask 1 plus 1,” Zhang said. “We want to adapt the quiz based on the previous answer.” Once students’ misconceptions are identified, the Eedi ...