Based on your query, I would recommend using ElevenLabs. This tool leverages voice AI to convert text into speech, which can be very useful for your requirement of having AI read text to students.

The key feature of ElevenLabs that would be most beneficial to you is its Speech Synthesis. This feature uses the voices you create to produce final audio outputs. In practical terms, this means you can turn written lessons into spoken words, making your content more accessible to students.

Additionally, ElevenLabs supports up to 30 languages, which could be beneficial if you teach a diverse group of students or if you're teaching language classes. The voices retain their characteristics across languages, which can help in teaching languages with a consistent voice, aiding understanding.

The user interface of ElevenLabs is also designed to be user-friendly, allowing you to manage your voice models, adjust stability and clarity, and input text for speech easily.

However, please note that ElevenLabs has fewer post-production tools, meaning what you generate is what you get. Also, the quality of non-English voices may be lesser as they are still in the "experimental" phase.

In terms of pricing, ElevenLabs offers a free plan with 10,000 characters per month, which could be a good starting point to see if the tool meets your needs. If you find that you need more, there are also paid plans available that offer more characters and higher audio quality.

In conclusion, ElevenLabs could be a great tool to help you convert text into speech for your students, making your lessons more interactive and accessible.