My 2nd and 3rd block will be on a field trip.
Only two students from 3rd period should be in class.
Let them study for their test on Wednesday and use this time as a study hall.
4th block is my Biology class.
Have them watch the documentary linked below and complete the handout that goes with the documentary.
I would let a student sit at my computer and pause the film as needed so they can answer all of the questions.
Here is the link to the film:
https://www.youtube.com/watch?v=jqxENMKaeCU