Linear measurement is more than just learning how to use a ruler. In the early grades, measurement activities develop students’ understanding of the properties of objects as well as what it means to measure objects. Hands-on activities can enable students to explore such measurable properties as height and length, and direct comparisons of various objects provide opportunities for students to gain a conceptual foundation of measurement before using standardized tools such as rulers and metersticks. A series of activities were created to develop measurement skills in young learners. They have been used successfully with children in first and second grades. Students complete the activities individually but collaborate with peers as they discuss their experiences and observations together.