"school lesson" is a correct and usable phrase in written English.
You can use it to refer to an academic subject taught in school, or a course of instruction. For example, "My son's favorite school lesson is mathematics."
It seems like a grade school lesson.
This isn't a school lesson or a counselling session.
The morning's Sunday school lesson was on "The Love That Forgives".
A total of 175 8- and 10-year-old children participated and were randomly assigned to a Film once condition, a Film Repetition condition, a School Lesson once condition or a School Lesson plus Film condition.
She recalled the Sunday school lesson she taught in Little Rock.
I used to teach a Sunday school lesson about how you had to forgive yourself.
One cure for a crisis of faith: a Sunday school lesson taught by the former president.
Yes, some of this plays like an after-school special or a Sunday school lesson.
(PBS's Web site offers both middle school and high school lesson plans based on the film).
Mills allegedly honed his production style after being excluded from every school lesson other than music.
In New York, the public television station WNET is also creating middle and high school lesson plans for each episode.
