Online note-taking tools can help students by providing a way to study for tests. showing them how to take notes. explaining how to do homework. providing the answers to tests. (in my logic I'd say it's "providing a way to study for tests, but I want to double check.)

Yeah, it makes sense, but try and replace the second "providing" to avoid repetition.

Explanation:

I'd also add "familiarises them with writing on a digital support, as well as makes it easier for them to have a clear image about the lesson, creating a smooth background (on paper there are many factors that might make notes look awful)".