This is a farm-themed problem-solving activity that you can use with the entire class, small groups, or in a math learning center. It includes the barnyard story mat, pig counters and a worksheet on which the children record their addition and subtraction problems. The kids love manipulating the pigs on the story mat. The pictures of the tree and barn on the recording sheet really help them to record the numbers in the correct spot for their number sentence. This is especially helpful when doing subtraction problems. Since the students must write in the plus or minus sign, they become much more aware of what each means.