Vocabla - Learn English and Spanish

Vocabla is a service for learning English, Spanish, and Polish vocabulary. The service can be used online or with the free iPhone and Android apps. The concept behind Vocabla is similar to a lot of other language learning applications. In Vocabla you can create lists of words and phrases that you want to learn. Alternatively, you can select a list that was made by someone else and shared to the Vocabla library. You can study each list in a flashcard style until you feel like you're ready to take a practice quiz. You can earn digital trophies and badges for your scores on the quizzes that you complete.

Applications for Education
The aspect of Vocabla that makes it a nice option for use by teachers is that you can create a list of words and share publicly. All of your students can then use that list to study on their own.