http://www.teachengineering.org/view_lesson.php?url=collection/cub_/lessons/cub_simp_machines/cub_simp_machines_lesson04.xmllessontext/xmlIntegrated Teaching and Learning Program, simple machinecompound machineleverwheel-and-axlescrewinclined planepulleywedgeworkmechanical advantageCompound MachineLeverLogicMechanical AdvantageModelQuantitativeRube GoldbergSimple MachineWheel-and-Axle

Students expand upon their understanding of simple machines with an introduction to compound machines. A compound machine — a combination of two or more simple machines — can affect work more than its individual components. Engineers who design compound machines aim to benefit society by lessening the amount of work that people exert for even common household tasks. This lesson encourages students to critically think about machine inventions and their role in our lives.

Inventing and designing are at the heart of engineering. Engineers use their math and science knowledge to create new products or improve existing ones in hopes of improving people’s lives. There is a certain process engineers go through when they invent or design a new or improved product. This process includes identifying the problem, thinking of possible solutions, modeling the system or process, then iterating and improving the product until the optimal solution within the given constraints is achieved. Much of mechanical design involves the simple and compound machines described in this unit.Recognize how compound machines are used in many familiar engineering systems today and name several found in daily life.Explain the difference between compound and simple machines.Explain how to calculate the mechanical advantage of compound machines.20TeachEngineering.orgMichael BendewaldMalinda Schaefer ZarskeJanet Yowellhttp://www.archives.gov.on.ca/english/common/c510681.htmS11416D1International_Technology_Education_Association-ITEA_STL_StandardsTechnologyG. The development of technology is a human activity and is the result of individual and collective needs and the ability to be creative. 68S11424D2ColoradoSciencea. Predict and evaluate the movement of an object by examining the forces applied to it 88S11424D3ColoradoScienceb. Use mathematical expressions to describe the movement of an object 88S1142658ColoradoMatha. Add, subtract, multiply and divide rational numbers including integers, positive and negative fractions and decimals 88United StatesCopyright 2012 - Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulderhttp://www.teachengineering.org/policy_ipp.phphttp://www.teachengineering.org/2010-08-238Teacher