If you want to open a lesson in order to start teaching a student, choose the Lesson in a Schedule, and then press Start a lesson.
In order to edit a lesson, you need to choose it in a Library. Now you can modify it accordingly.
If you want to open a lesson in order to start teaching a student, choose the Lesson in a Schedule, and then press Start a lesson.
In order to edit a lesson, you need to choose it in a Library. Now you can modify it accordingly.