Before you can strategize about how to start a class presentation, you need to be certain that you understand the assignment details. Consult materials that your instructor provided, like rubrics, to determine what your presentation needs to cover and what form it should take.
For instance, are you presenting individually or as part of a group? How long should the presentation be? Are you required to have visuals? Knowing these details will help you to plan a successful class presentation.
How to Read an Assignment
Harvard's Writing Center presents advice on how to closely read assignment guidelines.
Understanding Assignments
UNC's Writing Center features tips on understanding what's expected in an assignment.