World TESOL Academy is a great program

World TESOL Academy covers the fundamentals and supporting concepts/practices for teaching English to students, both in the classroom and online. It supplies approachable lessons that are easy to reference at any point during your studies through nicely articulated definitions and examples (written, pictures, and videos).

The fact you can take the quizzes over (not the final test) is a powerful tool that shouldn't be overlooked. Try not to think of it as simply going for 100%, but use that objective as a way to study. Whenever you answer the question, it reinforces the knowledge you know or need to work on.

In conclusion, this is a great program and covers material in a way that is sometimes clearer than the writings you can find online.