Longman Dictionary of Contemporary English
Wikipedia
A teaching assistant or teacher's aide (TA) or education assistant (EA) is an individual who assists a teacher with instructional responsibilities. TAs include: graduate teaching assistants (GTAs), who are graduate students; undergraduate teaching assistants (UTAs), who are undergraduate students; secondary school TAs, who are either high school students or adults; and elementary school TAs, who are adults (also known as paraprofessional educators or teacher's aides). By definition, TAs assist with classes, but many graduate students serve as the sole instructor for one or more classes each semester as a teaching fellow or graduate student instructor. Graduate and adult TAs generally have a fixed salary determined by each contract period (usually a semester or an academic year); however, undergraduates and high school students are sometimes unpaid and, in the US and other countries with the credit system, receive course credits in return for their assistance. Teaching assistants often help the main teacher by managing students with learning disabilities, such as ADHD, or even physical disabilities, such as blindness or deafness.
A teaching assistant or educational assistant (often abbreviated to TA or EA; sometimes classroom assistant) in schools in England and Wales is a person who supports students in the classroom. Duties can differ dramatically from school to school, though the underlying tasks often remain the same
Usage examples of "teaching assistant".
A former teacher of mine, who'd been a teaching assistant at SUNY-Albany when I was in graduate school there, is principal.
I'm a teaching assistant, and one of my assignments is to lecture first-year engineers on the history of science and technology.
In Sarek's office, his teaching assistant, Eleyna Miller, was going through the programs designed by the class he was about to teach.
The ratty old couch from Bob Lender's office, on which Bob had first seduced teaching assistant Linda Dekke, who was now Mrs.
I didn't have the requisite degrees and only a year of experience (I had been a teaching assistant in Houston), but the hiring committee was desperate, and they recognized some names: Tess Gallagher, Raymond Carver.
What this means is that my teaching assistant will take over the course for the remainder of the semester.
Apparently someone who looked a lot like me, a former Tulane teaching assistant named George Peters or the man for whom the woman in the old Denver airport had mistaken me, had been cruising the lobby of a Chicago hotel.
Since he was a teaching assistant, his quarters were even smaller than the ones she'd just come from, and he was probably strapped for cash, she opted for workouts.
Bunny soaked up everything Namid had to say, while Diego made a pain of himself, playing teaching assistant.