These scientific investigations will engage students in understanding the force of magnetism and how this force can be used for work. The students will begin the unit by forming generalizations about magnets and their forces through their own knowledge and scientific investigations. The students will explore the variations between different magnet strengths. Finally, the students engineer a system that will utilize magnets to propel and guide a vehicle through a track. Students will use the engineering design process to determine the optimal type and placement of magnets around a predetermined track through testing and synthesis. Students will engage in collecting, analyzing and sharing data throughout this collaborative, inquiry-based unit.