This is one engineering design challenge that your students will love! Included is teacher notes, student lab sheets, materials list and student handouts. Students will design cantilever spans to span as far as they can creatively design. Cantilever spans are found everywhere in our world from bridges, freeway signs to your local Home Depot and other stores. They are used to hold large loads. Students will design, develop, participate in a hands engineering lab, collaboratively work together, discuss, collect data, critically think and graph their results. Be sure to read the "cantilever span read me first" before beginning. This lesson is adaptable for grades 3-8.