This 25-minute professional development video demonstrates how a 4th-grade teacher guides her students in applying their number sense and computational skills to estimate the number of apples an acre of apple trees would produce. Consider how she scaffolds her students’ knowledge by having them estimate first small, then larger quantities. The instructor uses a literature connection to introduce the problem. A lesson plan with materials is available.


  • Language Arts > General
  • 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 3,Statistics,NSDL,Grade 4,Area,Addition,Data presentation,Number patterns,Spatial sense,Strategies,Number concepts,Social Sciences,Arithmetic,Analyze and persevere,Concept formation,Division,Number and operations,Upper Elementary,Mathematical language,Grade 5,Teaching strategies,Attend to precision,Volume,Model with mathematics,Data and measurement issues,Education,Ratio and proportion,Multiplication,Modeling,Patterns and sequences,Whole numbers,Data collection,Use appropriate tools,Vocational/Professional Development Education,NSDL_SetSpec_ncs-NSDL-COLLECTION-000-003-112-027,Practice Standards,Mental calculation,oai:nsdl.org:2200/20140728161134911T,Data analysis,Language Arts,English,Reason quantitatively,Communication,Physics,Operations,Estimation,Systems of measurement,Number sense,Mathematics,General,Connections,Rate,Elementary School,Problem solving,Measurement,Process skills,Counting,Construct arguments,Reasoning,Representation,Sampling and surveys



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