One overhead projector set is available in the college as a teaching aid.

They are still often broadcast on television and used as a teaching aid.

He also created a teaching aid for the game, Autobackgammon.

Most educators then saw little potential in radio as a teaching aid.

It has been recommended as a teaching aid for science classes.

The department has developed a small museum as a teaching aid for students.

The museum is regularly used by schools, colleges and adult education groups as a teaching aid.

It was developed into a teaching aid to help children acquire reading and writing skills.

The film was used as a teaching aid in New York schools.

You want to buy a different club, to get this teaching aid.