This interactive Flash game helps students practice counting, subitizing, and grouping by 10s, as they transport Okta the Octopus and his friends to a safe ocean. The goal is to select given numbers of Oktas as quickly as possible before the timer runs out. Then users count the total number of Oktas "saved" and identify that number on a number line. Students choose from three levels of difficulty, which vary according to time limit, range of target numbers, and whether visual target cues appear. These settings are customizable. Users who count incorrectly are given the option of visual help in recounting.


  • 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,Make use of structure,NSDL,Early Elementary,Kindergarten,Visual representation,Mathematics,Arithmetic,Concept formation,Process skills,Number and operations,Place value,Comparison of numbers,Life Science,Composition and decomposition of numbers,Informal Education,NSDL_SetSpec_ncs-NSDL-COLLECTION-000-003-112-027,oai:nsdl.org:2200/20140728160733336T,Practice Standards,Elementary School,Representation,Chemistry,Parity,Estimation,Education,Number sense,Connections,Engineering,Counting



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