Leaning to count is the first mathematical concept taught to young children. By seeing, hearing and writing numbers over and over, young children learn number recognition, number order and one-to-one correspondence. This week in Play School, we explore numbers and counting through play, singing and cooking. A cardboard box house with cardboard furniture and cardboard roll people is the focal point throughout the week. Each day we sing "How Many People Live at Your House?" and count the number of people in the cardboard box house.