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Topic: Estimation 

Mathematics

 Standard 3.  Uses basic and advanced procedures while performing the processes of computation
  Level I (Grade K-2)
   Benchmark 3.Understands basic estimation strategies (e.g., using reference sets, using front-end digits) and terms (e.g., "about," "near," "closer to," "between," "a little less than")
    Knowledge/skill statements
     1.Understands the term "about"
     2.Understands the term "near"
     3.Understands the term "closer to"
     4.Understands the term "between"
     5.Understands the term "a little less than"
     6.Understands the concept of reference sets in estimation
     7.Understands the concept of front-end estimation
     8.Understands the concept of estimation as a strategy
  Level II (Grade 3-5)
   Benchmark 4.Uses specific strategies (e.g., front-end estimation, rounding) to estimate computations and to check the reasonableness of computational results
    Knowledge/skill statements
     1. Understands the concept of estimation for computations
     2. Uses front-end estimation to estimate computations
     3. Uses front-end estimation to check reasonableness of computation results
     4. Uses rounding to estimate computations
     5. Uses rounding to check the reasonableness of computation results
  Level III (Grade 6-8)
   Benchmark 8.Knows when an estimate is more appropriate than an exact answer for a variety of problem situations
    Knowledge/skill statements
     1.Understands situations in which an estimate is more appropriate than a calculation
  Level IV (Grade 9-12)
   Benchmark 3.Understands various sources of discrepancy between an estimate and a calculated answer
    Knowledge/skill statements
     1.Understands sources of discrepancy between an estimate and a calculation
 Standard 4.  Understands and applies basic and advanced properties of the concepts of measurement
  Level Pre-K (Grade Pre-K)
   Benchmark 3.Estimates quantities in real-world situations
    Knowledge/skill statements
     1.Knows that estimation is not an exact amount
     2.Knows that the number of objects in a group can be estimated