What are other types? What type is AllATP?
There are basically 2 types of flight schools in the US, Part 61 and Part 141. Part 141 is extremely rigid in their curriculum and allows minimal deviation. ATP is a Part 61 school which is what allows them to offer accelerated training.
Part 141 schools operate under an FAA approved curriculum. That being said, they have heavy government influence and can be absolutely arduous to go through.
ATP is a part 61 school. The students take the exact same checkrides, but the schools have more freedom in how to train the students.
Thanks for clarification. For some reason I was under the impression we could choose Part61 or Part141 training at ATP