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Topic: Calendar time 

Historical Understanding

 Standard 1.  Understands and knows how to analyze chronological relationships and patterns
  Level I (Grade K-2)
   Benchmark 4.Understands calendar time in days, weeks, and months
    Knowledge/skill statements
     1.Knows that a calendar is a method of measuring time
     2.Knows that one day contains twenty-four hours
     3.Knows that one week contains seven days
     4.Knows that one month contains four weeks
  Level II (Grade 5-6)
   Benchmark 1.Understands calendar time in years, decades, and centuries
    Knowledge/skill statements
     1.Knows that a year contains twelve months
     2.Knows that a decade contains ten years
     3.Knows that a century contains one hundred years
  Level III (Grade 6-8)
   Benchmark 3.Knows how to calculate calendar time B.C. (before Christ) or B.C.E. (before the Common Era), and A.D. (Anno Domini) or C.E. (in the Common Era), determining the onset, duration, and ending dates of historical events or developments
    Knowledge/skill statements
     1.Knows how to calculate calendar time B.C. or B.C.E to determine onset, duration, and ending dates of historical events or developments
     2.Knows how to calculate calendar time A.D. or C.E. to determine onset, duration, and ending dates of historical events or developments
  Level IV (Grade 9-12)
   Benchmark 4.Understands alternative systems of recording time (e.g., Egyptian, Indian, Mayan, Muslim, Jewish), astronomical systems on which they are based (e.g., solar, lunar, semilunar), their fixed points for measuring time, and their strengths and weaknesses
    Knowledge/skill statements
     1.Understands the Egyptian system of recording time
     2.Understands the Indian system of recording time
     3.Understands the Mayan system of recording time
     4.Understands the Muslim system of recording time
     5.Understands the Jewish system of recording time
     6.Knows that there are alternative systems of recording time based on solar systems
     7.Knows that there are alternative systems of recording time based on the lunar system
     8.Knows that there are alternative systems of recording time based on semilunar systems
     9.Knows the fixed points for measuring time in alternative systems of recording time
     10.Knows the strengths of alternative systems of recording time
     11.Knows the weaknesses of alternative systems of recording time