illuminations: welcome to illuminations
illuminations: welcome to illuminations
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explore our library of 96 online activities that help to make math come alive in the classroom or at home
view our collection of 508 lessons for prek-12 math educators
learn about nctm’s principles and standards for school mathematics
check out hundreds of exemplary online resources, as identified by an editorial panel
highlighted activity
pan balance - shapes
find shapes to balance the scale
explore relationships among the weights of various objects by placing them on either side of a balance scale.
highlighted lesson
check that digit
applying modular arithmetic to barcodes and credit cards
this lesson introduces students to a common and practical use of modular arithmetic by looking at upc and isbn bar coding. then, students will discover the applications of modular arithmetic as applied to credit card numbers.
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e-workshops
implementing the algebra standard
geometric thinking
reasoning with data and probability
2007-08 focus of the year
becoming certain about uncertainty: data analysis and probability
more and better mathematics for all students
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