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Topic: Precision/accuracy 


 Standard 4.  Understands and applies basic and advanced properties of the concepts of measurement
  Level II (Grade 3-5)
   Benchmark 5.Understands that measurement is not exact (i.e., measurements may give slightly different numbers when measured multiple times)
    Knowledge/skill statements
     1.Understands that repeated measures may yield different numbers
     2.Understands that measurement is not exact
  Level III (Grade 6-8)
   Benchmark 5.Understands the concepts of precision and significant digits as they relate to measurement (e.g., how units indicate precision)
    Knowledge/skill statements
     1.Understands the concept of significant digits as it relates to measurement
     2.Understands the concept of precision as it relates to measurement
     3.Understands how units indicate precision
   Benchmark 6.Selects and uses appropriate units and tools, depending on degree of accuracy required, to find measurements for real-world problems
    Knowledge/skill statements
     1.Selects an appropriate measurement tool based on needed accuracy
     2.Selects an appropriate measurement unit based on needed accuracy
  Level IV (Grade 9-12)
   Benchmark 2.Understands the concepts of absolute and relative errors in measurement
    Knowledge/skill statements
     1.Understands the concept of a relative error in measurement
     2.Understands the concept of an absolute error in measurement