Hedera is an online language learning environment inspired by research on language acquisition. Hedera gauges the readability of texts based on the words a learner knows in order to identify material that is comprehensible enough to gain the benefits of extensive reading of level-appropriate material. Once the learner chooses a text, Hedera provides a reading environment with personalized support.
The project is still in the relatively early stages of development. Currently Latin in the only supported language. Ancient Greek and Russian should be coming soon.