Final answer:
Jack first saw August in the classroom during a pre-orientation tour at Beecher Prep.
Step-by-step explanation:
The first time Jack saw August in the book 'Wonder' by R.J. Palacio was in the classroom. When August started school at Beecher Prep, Jack was one of the students selected by the principal Mr. Tushman to give August a tour of the school. Jack encountered August during this pre-orientation tour, which was before the school year started and prior to meeting in the regular classroom session.