I think that we should get rid of the bad teachers. I am not saying all teachers are bad, but some are very poor teachers and have no patience for the slower learning kids. To find the bad teachers we should put cameras in the classrooms to watch their performance. We should also have the teachers who are doing a good job get something to congratulate them for their hard work.
If a student has a speech problem, they should still let them answer the question even if it takes them longer and they still have the right to an education.
When the principals do their evaluations the teachers are on their best behavior, and tell the students to be on their best behavior. Also, with the cameras you will get fewer students giving substitute's teacher's a hard time.