Pittsburgh Filmmakers School will give free seminars at its location at 477 Melwood Ave., Oakland. The classes, which run 6 to 8 p.m., will cover posting to the Web (stills and video) on Wednesday, the final installment. This introductory offer is for new students only. Admission is free. To enroll, call 412-681-5449.

Rangos Omnimax Theater at the Carnegie Science Center, One Allegheny Ave., North Side, is showing "Greece: Secrets of the Past," "Under the Sea," and "Grand Canyon Adventure: River at Risk." Admission cost varies. Omnimax is not recommended for children younger than 3. Call 412-237-3400 for show times.

<B>Tuesdays@2</B> free movies is scheduled to show "Milk" starring Sean Penn and Josh Brolin at 2 p.m. Tuesday in the Kean Theatre at St. Barnabas, Washington Place, 5847 Meridian Road. At the same site, <B>Wednesdays@1</B> will show "Valkyrie" with Tom Cruise and Kenneth Branagh at 1 p.m. Wednesday. Admission is free to both, but donations are accepted to benefit the St. Barnabas Free Care Fund. Call 724-444-6288.