Hello Marta!

Yes, this is possible. You can have as many classes as you want in your profile and you can add your students to all of them - please check this article to better understand how this works. You can also define different courses for the same class in the Settings tab for your class dashboard.

And in case you'd like a few resources as you continue to set up your classrooms, I'd like to recommend some of our Help Center features, including:

• Teachers — Here's How to Use Khan Academy for Remote Learning - this webinar is an excellent start point to get a full picture of our teacher's dashboard. You may find other helpful videos in this playlist.
• Our Teacher Start-up Guide
• How to Manage your Roster
• How to Edit, Copy, and Delete Assignments
• How to Manage Assignments
• How to View Students' Performance and Progress

Also, I'd just like to take a moment to thank you for all your work in continuing your students' learning in these difficult times. At Khan Academy, we are so grateful for teachers like you!

I have a student in two different classes and when they work on the assignments from the higher grade, at a certain point they see assignments from the lower grade.  How can they just see and use the material for the higher grade?

Thank you for your help.

Mrs. TT