Nothing ages as poorly as an educational film. The hairstyles, the clothing and, above all, the cornball advice doled out by earnest narrators ("don't be a Mr. Bungle") get stale so quickly that you suspect the generation it was produced for found it just as ridiculous as we do today. Ironically, the passage of a decade or two makes almost all of these films highly entertaining in retrospect. And so the Washington University Libraries presents a selection of vintage educational films for Rawstock at 6 p.m. tonight at the Stage at KDHX (3524 Washington Avenue; www.cinemastlouis.org). The 90-minute program will be screened the old-fashioned way: on 16mm film, a.k.a. "the classroom special." Admission is free.