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Teacher Developed Classroom Tested

Challenge students to determine the greatest common factor or least common denominator for a series of 50 different number sets. Each card features a double level design with a problem presented above and an attached paper door below that hides the answer. Use on the overhead for full class visibility and participation or use them as traditional flashcards. Students can also use base ten blocks and fraction pieces at their desks to help solve each problem. Developed by teacher, Tim Larsen.
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