This three lesson unit (15-page pdf) presents activities that guide students to understand the probability terms "certain" and "impossible". In each of the first two lessons students work as a class to conduct an experiment, complete sentences about the contents of a mystery bag, write probability statements, and express probability as common fractions. In the final lesson the class hears a story that contains both certain and impossible events. Students discuss which events are certain and impossible, and then construct a class book illustrating these concepts.


  • Language Arts > General
  • Mathematics > General
  • Education > General

Education Levels:

  • Grade 1
  • Grade 2
  • Grade 3
  • Grade 4
  • Grade 5
  • Grade 6
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Grade 2,Grade 3,Statistics,NSDL,Early Elementary,Grade 1,oai:nsdl.org:2200/20140728161058101T,Mathematics,Equivalent fractions,Arithmetic,Fractions,Process skills,Number and operations,Upper Elementary,Social Sciences,Modeling,Concept formation,Data collection,NSDL_SetSpec_ncs-NSDL-COLLECTION-000-003-112-027,Practice Standards,Elementary School,Language Arts,Sampling and surveys,Representation,Experimental and theoretical probability,Education,Probability,Communication,General,Connections,Vocational/Professional Development Education,Writing in mathematics,Counting,Construct arguments,Reasoning



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