With this interactive applet students can develop their understanding of place value and the relative position and magnitude of numbers in the base-10 number system. Users drag given numbers to their position on a number line, zooming in and out to increase precision. They can select from six levels of difficulty (Tens, Hundreds, Thousands, Millions, Billions, Decimals) and from 1 to 3 dots. There are three modes: Explore, Practice, Test.
Keywords:Grade 2,Grade 3,Grade 1,Make use of structure,NSDL,Grade 4,Grade 5,Addition,Early Elementary,Visual representation,Representation,Number concepts,Social Sciences,Arithmetic,Analyze and persevere,Concept formation,oai:nsdl.org:2200/20140728161215590T,Number and operations,Upper Elementary,Place value,Attend to precision,Subtraction,Life Science,Composition and decomposition of numbers,Informal Education,Whole numbers,NSDL_SetSpec_ncs-NSDL-COLLECTION-000-003-112-027,Comparison of numbers,Practice Standards,Elementary School,Reason quantitatively,Chemistry,Decimals,Operations,Mental calculation,Number sense,Mathematics,Connections,Engineering,Process skills,Education