The lesson plan specifically explains rules and strategies for combining integers and applying the appropriate sign rules in order to obtain an accurate answer. The lesson plan breaks down rules and strategies step by step in order to decide the correct way to combine the digits. This lesson plan should be presented either day 2 or 3 of the Integer unit. The plan incorporates what to do when solving equations with "double negatives". Students are presented 2 strategies including sign identification and the "leave change change strategy".