This Instructional Activity is a part of the Lesson 1, Unit 3, Grade 6. The purpose of this exercise is to let students construct the number line (positive and negative numbers and zero) using a compass. Have students draw a line, place a point on the line, and label it. Have students use the compass to locate and label the next point, thus creating the scale. Students continue to locate other whole numbers to the right of zero using the same unit measure. Using the same process, have students locate the opposites of the whole numbers.