It happened the night of November 5th at the Prism Career Institute in the 8000 block of the boulevard in Rhawnhurst.
Police arrived to find the front door forced open.
Surveillance video shows the suspect walking into the building, leaving, then returning with a shopping cart. He steals a flat-screen television set, loads it into the cart and leaves.
Cameras caught the man and an apparent accomplice rolling the cart down the sidewalk along Roosevelt Boulevard.
Police say the man later returned and stole more items from the building.
Investigators are looking for a white male, 35-40 years old, 5'6"-5'9" with a medium build. He was wearing a black Eagles baseball cap, jeans and a dark colored hooded sweatshirt.
Anyone with information is urged to contact Philadelphia Police at 215-686-TIPS (8477), text a tip to PPD TIP (773847) or through PhillyPolice.com.