Topic: Estimation 
Mathematics 
 Standard 3. Uses basic and advanced procedures while performing the processes of computation 
  Level I (Grade K2) 
   Benchmark 3.  Understands basic estimation strategies (e.g., using reference sets, using frontend 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 frontend estimation 
     8.  Understands the concept of estimation as a strategy 
  Level II (Grade 35) 
   Benchmark 4.  Uses specific strategies (e.g., frontend 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 frontend estimation to estimate computations 
     3.  Uses frontend 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 68) 
   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 912) 
   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 PreK (Grade PreK) 
   Benchmark 3.  Estimates quantities in realworld 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 