This problem requires children to make sense of information and to work in a systematic way. The interactive is a machine with four colored lights, each corresponding to a rule regarding number properties. Students are to discover numbers that will satisfy all four rules and switch on all the lights. The Teachers' Notes page offers rationale, suggestions for implementation, discussion questions, ideas for extension and support.
Keywords:Grade 3,NSDL,Grade 4,Factors,Express regularity,Strategies,Number concepts,oai:nsdl.org:2200/20140728160759910T,Arithmetic,Analyze and persevere,Concept formation,Division,Number and operations,Inductive reasoning,Algebra,Grade 5,Multiplication,Composition and decomposition of numbers,Logic and foundations,Informal Education,Whole numbers,NSDL_SetSpec_ncs-NSDL-COLLECTION-000-003-112-027,Comparison of numbers,Practice Standards,Life Science,Elementary School,Reason quantitatively,Algebraic thinking,Chemistry,Operations,Parity,Upper Elementary,Communication,Mathematical language,Mathematics,General,Connections,Problem solving,Process skills,Education,Construct arguments,Reasoning