This activity and Java applet allows a student to explore modular arithmetic. It is also a tool for finding remainders where all the possible numbers (the numbers less than the divisor) are put in a circle or clock. The learner uses the scroll bar to modify the size of the clock from 2 to 26 hours, sets a starting value and then moves the "clock" forward a number of specified hours to see the resulting sum. Support pages for the learner and the instructor are included.
Keywords:Grade 3,Make use of structure,NSDL,Grade 4,Grade 5,Addition,Express regularity,Representation,Number concepts,Social Sciences,Arithmetic,Analyze and persevere,Concept formation,Division,Number and operations,Visual representation,Subtraction,Life Science,Composition and decomposition of numbers,Patterns and sequences,Informal Education,Whole numbers,NSDL_SetSpec_ncs-NSDL-COLLECTION-000-003-112-027,Practice Standards,Number theory,Elementary School,Number patterns,Reason quantitatively,Chemistry,Operations,Mental calculation,Modular arithmetic,Upper Elementary,Mathematics,Connections,Engineering,Vocational/Professional Development Education,oai:nsdl.org:2200/20140728161252602T,Process skills,Education