This thin, wooden board is a tablet used in Koranic schools to practice writing. An Abrahamic prayer is written across the tablet in Arabic. The tablet has a hole at the top center that is drawn with a string to hang it on the wall. Tablets like these often have Koranic verses inscribed on them. The Koranic verses are then washed off and the ink solution is drank as a charm to ward off evil and sickness.
Penn Museum Object #29-201-704.
See this and other objects like it on Penn Museum’s Online Collection Database