Many students with special educational needs only have a limited grasp of addition and subtraction. Their problem often lies in the lack of automation. This volume offers extensive practice materials for addition and subtraction in the number ranges of 10, 20, and 100. The exercises range from naming quantities to calculating with symbols and pure numerical problems. Each worksheet contains several practice columns to allow for repeated automation of the tasks. At the end of the practice units for each number range, every student is rewarded with a motivating "Math King" certificate. Digital blank templates for creating their own worksheets complement the volume.