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Topic: System design and development 

Technology

 Standard 5.  Understands the nature and operation of systems
  Level II (Grade 3-5)
   Benchmark 3.Assembles and disassembles simple systems (e.g., familiar hardware devices)
    Knowledge/skill statements
     1.Knows steps to assemble a simple system
     2.Knows steps to disassemble a simple system
  Level III (Grade 6-8)
   Benchmark 4.Assembles and disassembles systems to manage, control, and improve their performance (e.g., a computer program, a simple machine based on a pulley mechanism)
    Knowledge/skill statements
     1.Assembles and disassembles systems to manage their performance
     2.Assembles and disassembles systems to control their performance
     3.Assembles and disassembles systems to improve their performance
  Level IV (Grade 9-12)
   Benchmark 5.Knows that even in simple systems, accurate prediction of the effect of changing some part of the system is not always possible
    Knowledge/skill statements
     1.Understands the limitations of predicting effects of system changes
   Benchmark 6.Constructs and operates systems (e.g., organizes and adjusts subsystems)
    Knowledge/skill statements
     1.Constructs a system
     2.Operates a system
     3.Organizes a subsystem
     4.Adjusts a subsystem
   Benchmark 7.Knows that complex systems are subject to failure and are designed with various elements and procedures (e.g., performance testing, overdesign, redundancy, more controls) that help reduce system failure
    Knowledge/skill statements
     1.Knows that complex systems are subject to failure
     2.Knows that complex systems are designed with various elements and procedures that help reduce system failure
     3.Knows that performance testing helps reduce system failure
     4.Knows that overdesign helps reduce system failure
     5.Knows that redundancy helps reduce system failure
     6.Knows that more controls help reduce system failure
 Standard 6.  Understands the nature and uses of different forms of technology
  Level II (Grade 3-5)
   Benchmark 2.Knows that elements of an agricultural system are designed to maximize the interaction and production of all the elements in the system (e.g., by composting, using plants for food, oxygen, and water and air filtration)
    Knowledge/skill statements
     1.Knows that elements of an agricultural system are designed to maximize the interaction of all the elements in the system
     2.Knows that elements of an agricultural system are designed to maximize the production of all the elements in the system
  Level III (Grade 6-8)
   Benchmark 3.Knows that most technological systems require an input of energy, which is an important consideration both in designing an object or a system and in conserving energy (e.g., so many things require energy that alternative sources to fossil fuels should be used when possible)
    Knowledge/skill statements
     1.Knows that most technological systems require an input of energy
     2.Knows that energy requirements must be is an important considered when designing an object or a system
     3.Understands that because so many things require energy, alternative sources to fossil fuels should be used when possible