This before and after activity is perfect for March math centers. Students can work independently or in small groups to determine which number comes before and after the number displayed by the leprechaun (Numbers 1-20 are provided). Simply print, laminate, and cut apart. Students can fill in the missing numbers with a dry erase marker or magnets. Students may also work on counting by using small manipulatives like mini erasers to show one more or one less. A worksheet is included to give students extra practice too!