This intereactive Flash applet helps children learn grouping, tally marks, place value, addition, and subtraction. Students help the alien spaceship move cows into corrals by counting by 5s and 10s. They also can apply those grouping skills to practice adding and subtracting two-digit numbers with regrouping. Audio cues and prompts reinforce the user's actions and facilitate counting and the development of math language.
Keywords:Grade 2,Grade 1,Make use of structure,NSDL,Addition,Early Elementary,Kindergarten,Visual representation,Representation,Number concepts,Social Sciences,Arithmetic,Analyze and persevere,Concept formation,Process skills,Number and operations,oai:nsdl.org:2200/20140728160929189T,Place value,Model with mathematics,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,Operations,Mental calculation,Education,Number sense,Mathematics,Connections,Engineering,Counting