If you are asking if MCPS grades on a curve to adjust grades, the answer is no. That is expressly prohibited by regulation. See p. 11:
The following grading practices are prohibited: ...
b) Forcing grades into a normal frequency distribution or any other kind of curve that compares students in relation to others.
https://ww2.montgomeryschoolsmd.org/departments/policy/pdf/ika-ra%20master.pdf