This Engineering Challenging is classroom ready. The materials are easy to come by. Included: teacher notes, materials list, student lab sheets, ending reflective questions, teacher notes, challenge print outs, challenge rules and directions, engineering challenge lesson plan that extends into four lessons. This lesson includes a cost component where students will be challenged to build a cost effective boat that holds the most weight. They will be asked to add their costs and provide a total. Students will use addition to add decimals. Enjoy and have fun with math and engineering!