He started his career as an **auxiliary** teacher.
An auxiliary teacher is a term commonly used to describe a teacher who supports the main or lead teacher in the classroom. They assist the lead teacher by providing additional supervision, support, and reinforcement of lessons and activities. They may also assist with classroom management, grading, and other administrative tasks.
In summary, an auxiliary teacher is someone who works alongside the main teacher to ensure the smooth functioning of the classroom and enhance the learning experience for students.