![]() ![]() National Environmental Education Week (week of Earth Day), Take Your Child To Work Day / Take Our Daughters And Sons To Work Day (fourth Thursday in April), Arbor Day (last Friday in April, dates vary by state), Astronomy Day (Spring) (held in April or May) - please see April for details The Doomsday rule is an algorithm of determination of the day of the week for a given date. At this event, students have the opportunity to compete in Math and Computer Science Competitions and win trophies and prizes. ![]() The most successful text of its kind, the 7th edition continues to provide a firm foundation in major concepts needed for continued study and guides students to think and express themselves mathematically-to analyze a situation, extract.
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