This education tool covers how insulin works in the body, types of insulin and treatment plans, and how to calculate mealtime insulin and correction insulin. Clients will also learn about testing patterns to check insulin doses along with the signs, symptoms, and treatment of hypoglycemia. An insulin dosing worksheet is provided for the diabetes educator to personalize a client's blood glucose target and insulin plan, and it shows a stepwise approach for calculating mealtime insulin. This booklet is an excellent follow-up to Choose Your Foods: Count Your Carbs.