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Topic: System testing and refinement  

Technology

 Standard 5.  Understands the nature and operation of systems
  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