In addition to grading your second exam, I suggest that you read Chapter 12 - "Principles of Grafting and Budding," in the textbook (Chapter 11 in the 7th and 8th editions of the textbook) and watch the Chapter 12 videos. You will also find Chapter 27 - "Grafting: Theory and Practice" in the supplemental reference "Plant Propagation: Concepts and Laboratory Exercises" to be helpful.
It will also be a good idea to start giving some serious thought to your capstone project, too (not, of course, that you haven't already done so;-)