(Instructional/polite) That's what I thought. Now, I will be pairing everyone for the science project. 

Remember, I want everyone to put together a project that has to do with the topic of "energy", and I would like to start pairing Juliet and Jackson together. 

(angry) Jackson had let loose the spiders in the lab and placed them in Alice's hair!

(stern) If you want a passing grade, you are going to have to do it, Jackson.