Grover has, at various times on Sesame Street and in books, donned the mortar cap and gown of Professor Grover, his lecturer alter-ego. In one such appearance, Grover explains how to take a bath, doing so while still wearing his scholar's cap. He has also done so for public appearances. On Feb. 8, 2005, Professor Grover visited Harvard University for a news conference announcing a new HGSE course, "Informal Learning for Children."