Wiktionary
teacherless
a. Without a teacher.
Usage examples of "teacherless".
She eyed him with the glance of a predatory beast for its prey, and Kemball, who would ordinarily have replied to such a suggestion with a trenchant reference to his teacherless class, sat down on the edge of the nearest chair and waited to hear what she had to say.
Caroline had walked in at that point, catching the still teacherless room in mid guffaw.