Our Lady of Lourdes Catholic School, 44 Cleveland Ave., Milltown, will hold an open house May 21 from 11 a.m. to 4 p.m. The free event will feature tours of the preschool, kindergarten, and grades one through eight. The school is accredited by the Middle States Commission for high standards of academic excellence. For more information, call the school office at (732) 828-1951.