There was a class of 18 for the 767 that started Monday the 29th of Feb. There will be no class next Monday, the 7th of March. The 14th will be a class of 24 for the 747, followed the next Monday with a class of 18 for the 767, then a week off. This sequence will repeat, every third 747 class will be a class of 32.

I have no idea how many are in the pool.

Class start date to IOE depends on equipment and the IOE backlog. I have friends that were in the August 10th 747 class that haven't finished IOE, and I have friends that were in later classes that have completed IOE and are flying the line. Your guess is as good as mine when it comes to this.