1. The consequences that he must face ARE the result of poor time management. (“consequences” is plural so “is” would be “are”)
2. If she HAD been on time to class, she would not have had to get a Hero pass. (“had” is used later in the sentence, so the first “has” would match and be “had”)
3. What would you do if you WERE an English teacher? (“were” follows you, not “was”)
4. Koala bears are not bears; they are marsupials and very unique. (these independent clauses can be split with a semicolon or period)
5. Jessica had a wonderful idea; she would order food to be delivered so that she WOULD not have to go into the grocery store. (again, these independent clauses can be split with a semicolon or period, and “would” would fit better than “did”)
I hope this was helpful!