Canva provides many examples of how it may be used in education. The following link will help you brainstorm some ideas. Some of the features are only available in the education version of Canva, which is for K-12 (not higher ed).
Best Colleges has a 2023 article on "How to Use Canva in College: 4 Tips for Students and Teachers.
The University of Colorado has some more ideas about using Canva.