I told my teacher I couldn't do a report on George Washington because he's a dead president.

This joke finds its funny bone in a delightful misunderstanding of the word "dead." The student tries to use the fact that George Washington is no longer with us as an excuse to skip a report, perhaps implying it's impossible to get new information or interview him. It's a classic case of literal interpretation running headfirst into common sense.

Of course, George Washington was the first President of the United States and a pivotal figure in American history. He's a very common subject for school reports, precisely because he's a historical figure whose life and contributions are well-documented. Students are expected to research and learn about people from the past, and their "deadness" is what makes them subjects of history rather than current events.

The humor really lands when the teacher cleverly turns the student's excuse into the very reason why the report is perfectly viable. It's a lighthearted jab at the sometimes-creative excuses students come up with and the straightforward logic of a teacher guiding them toward understanding their academic tasks.