STANFORD, CALIF. ? When the ball hits the backboard and bounces in for a baseline three-pointer, you know things are going right.

Josh Childress did just that on the way to scoring 12 points in No. 1 Stanford’s school-record 24th straight victory, 73-47 over Oregon State Thursday night.

Childress, a junior All-America candidate, also had five assists, two rebounds, a steal and a blocked shot for the Cardinal, who remained one of two unbeaten teams in Division One.

Point guard Chris Hernandez isn’t surprised the Cardinal are getting the breaks such as that shot by Childress — he says that’s what happens when you play good defense.

“We had one of those, and we also had a bank shot,” he said. “That’s all sparked from our defense. I think the general consensus was the last time we played this team we came out pretty flat. We wanted to make a statement.”

Hernandez scored 11 of his 13 points in the first 11 minutes and went 3-for-4 from three-point range as the Cardinal (24-0, 15-0 Pac-10) built a big lead early. Third-string swingman Fred Washington scored a career-high 11 points, and Stanford shot 52.8 percent.

No. 2 Saint Joseph’s is 25-0.

David Lucas had 14 points and 11 rebounds for Oregon State (11-14, 5-10), which had won three of four following a six-game losing streak. Oregon State’s 47 points were a season-low, one less than the Beavers scored in their first loss to Stanford last month.

“Defensively, those guys were everywhere,” Oregon State guard Chris Stephens said. “They were in all of our passing lanes, they blocked our shots, they disrupted us in transition.”

No. 4 Gonzaga 97, San Diego 78

Spokane, Wash. — Blake Stepp scored 24, all on three-pointers in the second half, and No. 4 Gonzaga beat San Diego for the Bulldogs’ 17th consecutive victory. Cory Violette added 20 points for Gonzaga (24-2, 13-0 West Coast Conference). The Bulldogs’ winning streak is third-longest in the country behind Stanford and Saint Joseph’s, the only unbeaten teams remaining in Division One and the only teams to beat Gonzaga this year.

No. 5 Duke 97, Valparaiso 63

Durham, N.C. — Daniel Ewing scored 20 points to lift No. 5 Duke past Valparaiso, the Blue Devils’ 41st consecutive home win. Luol Deng added 18 points for the Blue Devils (23-3), who hit a season-high 15 three-pointers. Shavlik Randolph had 16 points and J.J. Redick added 15 for Duke.

Washington 89, No. 17 Arizona 84

Tucson, Ariz. — Tre Simmons scored a career-high 22 points, and Washington held off No. 17 Arizona to move ahead of the Wildcats into second place in the Pac-10.

The Wildcats were playing without leading scorer Salim Stoudamire, suspended by coach Lute Olson “for failure to meet team responsibilities.”

After opening the conference schedule with five straight losses, the Huskies (14-10, 9-6) have won nine of 11.

No. 24 Utah State 67, Long Beach State 47

Long Beach, Calif. — Cardell Butler scored 23 points to lead No. 24 Utah State over Long Beach State, handing the 49ers their seventh straight loss. Butler, who scored nine of the Aggies’ first 10 points, went 8-for-8 from the free-throw line. He also had three three-pointers and six rebounds.