To have a teacher means to have someone who guides and helps you learn and understand new things. They are knowledgeable in a specific subject and provide instruction and support to help you gain knowledge and skills. Full definition
Most of these students, however, still don't have teachers who look like them. (gse.harvard.edu)
Since the students do not have a teacher in the classroom each day, they must learn to manage time and reach out to classmates and their teacher when needed. (kajeet.net)
I think it's important for all of us, of whatever faith, to have teachers in the flesh and also teachers in history. (christianitytoday.com)