Hello @laneteach
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I was just testing additional steps which might be a solution for you and the students
1. Create a drawing with an ellipse in AutoCAD Desktop or take the drawing I attached to this post.
2. Send the drawing to the students.
3. Upload the drawing to the file manager or your external storage provider.
4. You could use the drawing as a starting point and change the ellipse in this drawing. The properties already recognize it as an Ellipse. Just move and edit it as you want with the grips.

5. Until now creating a block from it and inserting this block in other drawings did not work on my side but when you are able to manage it, this could be a comfortable solution to add an ellipse also to other drawings.
Did the post helped you and answered your question? If yes, feel free to click on the button "Mark as Solution". Thus also other users can benefit from the information. In case you still need help please feel free to provide an update here so we as Community know how we can help you best moving forward.
Best regards,
Thomas
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Thomas Stühle
Technical Support Specialist