"SCHOOL'S OUT." BtVS Intertext/Allusion.
Track from shock rocker, Alice Cooper’s 1972 album School’s Out alluded to by Spike in the Season Seven finale "Chosen." The lyrics "School’s out for summer/School’s out forever/School’s been blown to pieces" are particularly apposite as Sunnydale High is completely destroyed in the final battle against the First.
The following dialogue is taken from the Buffy Dialogue Database:
SPIKE:
Go on, then.
BUFFY: No! No, you’ve done enough! You could still—
SPIKE: No, you’ve beaten them back. It’s for me to do the cleanup.
FAITH: Buffy, come on!
SPIKE: Gotta move, lamb. I think it’s fair to say, school’s out for the bloody summer.
BUFFY: Spike!
SPIKE: I mean it! I gotta do this.
(Buffy reaches for his outstretched hand, their fingers lace, then burst into flame)