Play educational games and use interactive lessons with TinyTap

TinyTap is a social platform which empowers families, teachers and students to learn from each other by creating their own personalized interactive lessons and games and playing thousands of new ones shared daily by a worldwide community of educators and learners worldwide.Together we are building the world’s largest marketplace for educational games – a community that celebrates creativity and knowledge!Free on the Web the App Store and on Google Play Android.

Source: TinyTap – Educational Games and Interactive Lessons

There are a ton of pre-built activities, like this one, that can be used without logging in. Unfortunately, to create apps you need to use the iPad app. This is a weird requirement, but a requirement nevertheless.