This packet is good for preK, kindergarten, and first grade. It could also be used in 2nd and 3rd as an RTI activity. In this packet there are a minimum of 5 activities to reinforce the concept of the addition and subtraction sign. There are two poems, a matching activity, a large group activity, and at least two center activities. The content progresses from very basic (identifying the signs and describing their meaning) to more advanced (addition and subtraction to 20). The packet was created by Just Peachy in First and is the first part of a 3 part series in building a strong math foundation.