This 5-minute video follows Carlos and Sara, students in Jennifer Saul's third grade class, as they explain different strategies, both mental and written, for adding multi-digit numbers. These children demonstrate effective presentations skills, while their classmates exhibit the established expectations for being a supportive audience. The page provides reflection questions for the viewer and downloadable supporting materials, including a transcript of the video (doc) and problem solving work samples from Carlos and Sara (pdf).


  • 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 3,Classroom management,NSDL,Grade 4,Teaching strategies,Addition,Early Elementary,Representation,Number concepts,oai:nsdl.org:2200/20140728160755255T,Arithmetic,Analyze and persevere,Concept formation,Process skills,Number and operations,Chemistry,Mathematical language,Grade 5,Social Sciences,Properties of operations,Model with mathematics,Subtraction,Multiplication,Composition and decomposition of numbers,Whole numbers,Vocational/Professional Development Education,NSDL_SetSpec_ncs-NSDL-COLLECTION-000-003-112-027,Practice Standards,Life Science,Elementary School,Algorithms,Educational environment,Modeling,Reason quantitatively,Communication,Decimals,Computing and Information,Operations,Mental calculation,Upper Elementary,Money,Mathematics,Connections,Problem solving,Measurement,Education,Construct arguments



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