You can start by saying what you enjoy about the school. What activities have you joined, what the classes are like, what types of sports teams they have, what the...
It's best to completely dispose of all waste from the dissection to avoid contact with chemicals that might have been used in the preservation process of the specimen.
Do it in a common area like the lunchroom or wherever people congregate before or after school (just make sure it's not the halls when people are trying to get...