There were no classes in Prince William County yesterday, but the Stonewall Jackson boys' and Potomac (Va.) girls' basketball teams learned welcome history lessons in the Virginia AAA Cedar Run District championships in Manassas.

The Stonewall Jackson boys, without a district title or regional berth since 1970, surged past Osbourn Park for a 54-49 victory that lifted the host Raiders into a Northwestern Region quarterfinal home game at 6 p.m. Saturday against the Commonwealth District runner-up.

The Potomac girls, whose most recent district banner is from 1987, ensured themselves another wall hanging for their gym with a 36-31 win over Osbourn. The Panthers will host Western Valley District runner-up Franklin County in a region quarterfinal at 6 p.m. Saturday.

Often in Virginia district finals, both teams are ensured regional berths. But that wasn't the case in either of yesterday's games, because both regular season champions (Potomac's boys and Osbourn Park's girls) had lost in the semifinals. The two regular season champions will play road games in the regional quarterfinals.

In yesterday's boys' game, Stonewall Jackson senior point guard Tyc Snow scored 21 points by going 14 for 18 at the foul line. Unfazed by a 3-for-12 shooting performance, he made a three-pointer with 2 minutes 18 seconds left that broke 45-45 tie and gave his team the lead for good. Neither team trailed by more than five points.

Potomac junior point guard Tiffany Jenkins also struggled offensively, making one field goal -- a layup that gave her team a seven-point lead with six minutes left -- but she sank 12 of 14 free throws and scored a team-high 14 points. No player from either girls' team made more than two field goals; the squads shot a combined 17 for 104 (16 percent).

Potomac (10-13) enters regionals on a four-game winning streak; Osbourn's season ended at 6-18.

Despite losing five of their last six regular season games, Stonewall Jackson's boys (11-12) took Potomac to overtime last week, then upset the Panthers in the district semifinals.

"Our whole focus this year was to win this tournament," third-year Stonewall coach Marcus Lawrence said. "The last three games . . . they brought it. They really brought it."

Senior Adam Hinton-Moore led Osbourn Park (9-13) with 18 points and 15 rebounds.

MSHL Crowns Sherwood

The Maryland Scholastic Hockey League Tier II Public School championship game between Broadneck and Sherwood was canceled for the second time, and Sherwood (10-0) was declared the winner by MSHL Commissioner Don Gensler because the Warriors had a better regular season record than Broadneck (5-4).

Broadneck, one of the few MSHL public school teams recognized as an official club by its school, was not allowed to play after Anne Arundel County canceled after-school activities.

"I don't understand why the league has allowed Sherwood to win the game without playing the game," Broadneck Coach Bob Atkinson said. "If we're going to lose, we'll lose gracefully, but at least let us have the chance to play, that's all we're asking."

Sherwood, the defending public school champion, will play Good Counsel today for the Chesapeake Cup.

Postponements

For the second consecutive day, many high school games were postponed because of the weather, including the first round of the Virginia AAA Northern Region basketball tournament and the Potomac Valley Athletic Conference's basketball finals.

Some events, including the Anne Arundel County basketball championships and regular season basketball games in Howard County, were canceled and will not be made up.

Also, the Virginia High School League officials said the Virginia AAA indoor track and field meet, scheduled for today and Saturday at George Mason University, will be condensed into a one-day event starting at 10 a.m. Saturday morning.

All-Mets

Instructions for nominating players for The Post's winter All-Met teams have been sent to schools. If you are a varsity coach and have not received these instructions, please contact The Post at 202-334-7350 or send an e-mail to hss@washpost.com.

Correction

An article in Feb. 17's editions incorrectly identified Bullis basketball player Travis Lay's grade. He is a junior.

-- Preston Williams

and Colin Fitzgibbons