This interactive Java learning tool, which was constructed using the cross-platform open educational resource GeoGebra, allows a teacher to demonstrate and explore the distributive property of multiplication over addition with students. The student also sees the relationship between two different formulas, a(b+c) and a(b) + c. The expression a(b+c) is shown in both expanded and factored form. Sliders change the values of each of the three variables with the whole numbers from 0 to 5. Check boxes also allow the user to hide or show expressions.
Keywords:Make use of structure,NSDL,Grade 5,Addition,oai:nsdl.org:2200/20140728161018627T,Visual representation,Representation,Number concepts,Social Sciences,Arithmetic,Concept formation,Process skills,Number and operations,Upper Elementary,Algebra,Properties of operations,Model with mathematics,Multiplication,Composition and decomposition of numbers,Whole numbers,Middle School,NSDL_SetSpec_ncs-NSDL-COLLECTION-000-003-112-027,Comparison of numbers,Instructional materials,Practice Standards,Grade 6,Life Science,Elementary School,Reason quantitatively,Chemistry,Operations,Mental calculation,Algebraic manipulation,Algebraic representation,Mathematics,Engineering,Vocational/Professional Development Education,Order of operations,Expressions,Education