10-Student Add-Ons must be purchased in conjunction with a Make Wonder STEM Classroom subscription. You may add up to 4 add-ons to this bundle by clicking on the "Add to bundle" button. 

If you need to accommodate more than 75 students, then you may need a different kind of Make Wonder subscription. Try the Make Wonder STEM Center subscription, or another teacher could purchase their own Make Wonder STEM Classroom subscription, to accommodate 2 teachers in 2 classrooms of up to 35 students each.

Still not sure? Email us at support@makewonder.com.