This Instructional Activity is a part of the Lesson 8, Unit 5, Grade 7. The purpose of this activity is to understand that a rate of travel at a constant speed (defined as velocity) can indicate the direction of travel, by using a negative or positive value to describe travel to the left or to the right of a location taken to be 0. Students use their earlier understanding of a chosen zero point and describe their movement left (negative) or right (positive) along the number line, with different speeds. This will produce negative or positive end points depending on if they are moving to the left or the right. This will lead to students describing negative numbers multiplied by positive in the next activity.