In this group activity, students work in teams of three or four. Each team is given a long strip of paper (at least 4 meters), several meter sticks, markers, and some events.
First, students create a number line using the meter stick (1 meter = 1 whole). They label the decimeters, which represent tenths, and centimeters, which represent hundredths. Whole numbers are prominently marked. The total length is about 4 ½ meters.
Then, students add events to their number line timeline. I give each group at most 20 events that have words, a photo, and a rational number or a mathematical expression that can be placed on a number line when evaluated.
I modeled several events for the students and then placed the items on the timeline. If students needed additional reinforcement, I could use materials like Scholastic DynaMath's fluency activities, which reinforce fraction and decimal math skills.