I think it's the 3rd one. Might be wrong though.
Answer:
It is relative to how the professor teaches his subject. If he is passionat about his subject, it will reflect on the how the children learn. This said, the children learn from the knowledge of the professor and his experiences. The latter happens if the professor continusly engages with his students.
Answer: Internal clocks is how they manage their time in their mind. School schedules is a set time.
It means a thorough and dramatic change in something
