From Newsweek - as of the year 2020:
Among the schools deemed tops for science, technology, engineering and mathematics (STEM) are “high-profile institutions” in urban areas and “small but strong programs” around the United States, according to Cooper. In all cases, she said the best STEM schools have “skilled teachers who keep up with developments in these fields and who create dynamic learning environments to engage their students.”
Here are all the STEM schools in Maryland that earned a spot on the list:
Baltimore Polytechnic Institute
Baltimore
Public
STEM Rank: 36
Poolesville High School
Poolesville
Public
STEM Rank: 121
Thomas S. Wootton High School
Rockville
Public
STEM Rank: 160
Eastern Technical High School
Essex
Public
STEM Rank: 240
Holton-Arms School
Bethesda
Public
STEM Rank: 243
Centennial High School
Ellicott City
Public
STEM Rank: 268
Winston Churchill High School
Potomac
Public
STEM Rank: 282
River Hill High School
Clarksville
Public
STEM Rank: 290
Towson High School
Towson
Public
STEM Rank: 310
Gilman School
Baltimore
Private
STEM Rank: 312
Marriotts Ridge High School
Marriottsville
Public
STEM Rank: 412
The Bryn Mawr School
Baltimore
Private
STEM Rank: 412
Walt Whitman High School
Bethesda
Public
STEM Rank: 419
Urbana High School
Ijamsville
Public
STEM Rank: 445
McDonogh School
Owings Mills
Private
STEM Rank: 459
Again, the private vs public school standards are just very different questions. Nobody is sending their kid to McD to be a County health inspector.
Let's look at the college attendance from Poly, at the top of your list:
1) Morgan State
2) UMD (UMCP)
3) Towson U
So let's compare fairly - Nobody is sending their kid to Gilman or McD to attend Morgan State or Towson unless it's on some kind of full ride. They *might* be sending their private school kid to UMCP on less-than-full scholarship, because the kid, with his "equal to the top 10% of public" basic-ness, could not get scholarships to Georgetown, ND, Boston College, etc, and if his parents have any sense, they send him to UMCP which is an outstanding college for any private or public school kid, at 1/3 the cost of an elite private college, the equivalent network of which they already purchased during HS.