一位美术老师用英语说是：an art teacher。

teacher

n. 教师，教员，老师，先生; [航] 教练机;

[例句]Im a teacher with 21 years experience..

我是个有21年教龄的教师。

An art teacher asks his students to draw a picture.

一位美术老师让他的学生画一幅画。

He wants to be an art teacher when he's left college.

他想在大学毕业后当一名美术教师。

Zhang: A science teacher, an art teacher and an English teacher.

张：一名科学教师，一个艺术老师和一名英语老师。