sentences:  It is uncertain how many teachers harbor misconceptions about zero.The Michigan studies did not publish data for individual questions.Betty Lichtenberg, an associate professor of mathematics education at the University of South Florida, in a 1972 study reported that when a group of prospective elementary school teachers were given a true-or-false test including the item "Zero is an even number", they found it to be a "tricky question", with about two thirds answering "False".