big east
There are around 1000 NCAA basketball schools in total, with 351 schools in 32 Division I basketball conferences. There are also other divisions, but only Division I gets shown on TV, and contains most of the players that go into the NBA.
388
mw
181
1,000 schools participate at the NCAA division 2
marshall
The majority of Division I basketball players went to public high schools, so naming them all would be impossible.
Division 1 schools can have varying numbers depending on the sport. Currently, basketball has the most with 344 teams in Division I.
Twenty
In Division 1-A football, that is Army, Navy, and Notre Dame.
The WestPAC conference is a league of high schools sports teams. This league is concerned with volleyball, basketball and football, as well as cross country.
Both are Division 1A schools. Virginia Tech plays in the Atlantic Coast Conference and Ohio State plays in the Big Ten Conference.