This packet of information for teachers is designed to be used with the How Many Berries Did I Eat? Problem of the Week from the Math Forum collection for grades K to 2. The sample problem provides an exemplar of the type of problem teachers can use to promote students' mathematical thinking and reasoning and engage their interest. The key concept addressed in this problem is subtraction. The packet contains the sample problem, alignment to the Common Core State Standards, possible solutions, teaching suggestions, a print-ready copy of the problem, and a problem-specific scoring rubric.


  • Mathematics > General
  • Education > General

Education Levels:

  • Grade 1
  • Grade 2
  • Grade 3
  • Grade 4
  • Grade 5
  • Grade 6
  • Grade 7
  • Grade 8
  • Grade 9
  • Grade 10
  • Grade 11
  • Grade 12


Grade 2,Grade 1,NSDL,Teaching strategies,Early Elementary,Kindergarten,Reason quantitatively,Number concepts,Arithmetic,Analyze and persevere,Concept formation,Process skills,Number and operations,Mathematical language,Word problems,Model with mathematics,Subtraction,Vocational/Professional Development Education,Whole numbers,Problem solving,NSDL_SetSpec_ncs-NSDL-COLLECTION-000-003-112-027,Reason abstractly,Practice Standards,Elementary School,Strategies,oai:nsdl.org:2200/20140728161113303T,Operations,Communication,Mathematics,Critique reasoning,Education,Construct arguments,Reasoning,Representation



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