I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "The objective is typically a course of study, lesson plan, or a practical skill. A teacher may follow standardized curricula as determined by the relevant authority. The teacher may interact with students of different ages, from infants to adults, students with different abilities and students with learning disabilities."? 

How old are the people taught by the teacher?