The COUNTDOWN web site features more than 800 instructional QuickTime math videos and 350 companion worksheets that are devoted to the demonstration and support of effective mathematics instruction. These multi-indexed math movies are organized according to content standards established by the National Council of Teachers of Mathematics allowing viewers to explore specific math concepts at their own pace. Whether you are an educator brushing up on formulas, a fifth grader figuring out equivalent fractions, a grad student completing a methods assignment or a concerned parent seeking an electronic math tutor for your child, this site is a rich math resource available free of charge for your repeated use. The video clips found on this site have been edited from hour-long interactive weekly TV broadcasts on Channel 21 in Chicago.