Your audience: your classmates and your instructor.

Your purpose: to let us know how the speaker affected your way of thinking about writing, professional training, educational and professional opportunities, and so forth. In short, what did you learn?

Your tone: The report is a formal genre, so use appropriate language. Of course it's ok to use "I" even in formal prose.

Begin by orienting your reader in space and time. This is a convention you'll use for nearly any piece of writing--any, that is, but a highly interactive email exchange, where you don't need to remind your interlocutor of what the conversation is about. Even though your classmates and I will have been present on each speaking occasion, you'll want to return us to this occasion with your words, identifying the speaker, his or her profession, the date, the occasion.

Next provide an overview of the talk.

Then zero in on particular parts of the talk that interest you. Pull out several "kernels" for analysis and make these kernels relevant to your life circumstances. Some possible avenues: What new information did the speaker provide? What beliefs or knowledge did he or she contradict? How do you account for this contradiction? How do your personal/professional interests intersect with the information provided? What questions did the speaker raise and leave unanswered?

Review your work for stylistic grace. Put your knowledge of active voice and other do's and don'ts to use.

Check grammar and comb your report for mechanical errors.

Review your writing and ask yourself if you've written something that your classmates and I would find interesting, as opposed to just letting us know that you were present and paying attention. Take this occasion to let us learn a little more about you.