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- Grade Range
- 3rd - 4th
- Rating
Students study how to find prime numbers. They investigate the teachings of the mathematician Eratosthenes and apply his theory of prime numbers less than 100. Full Review »
- Grade Range
- 4th - 6th
- Rating
Students analyze and discuss prime numbers and the Sieve of Eratosthenes, a procedure to sort out prime numbers. They identify the prime numbers from 1-100 by eliminating all the multiples of the first four prime numbers, and circle what remains. Full Review »
- Grade Range
- 6th - 8th
- Rating
Students demonstrate division rules to determine if a number is prime or composite. They apply multiplication facts to factor composite numbers. They apply fraction concepts in practical applications. Full Review »
- Grade Range
- 8th
- Rating
Students review their understanding about numbers and number systems through playing the Number Game. They create a list of numbers and based upon the characteristics and properties of the numbers they will earn points. Full Review »
- Grade Range
- 6th
- Rating
Students use the prime factorization of numbers to find the greatest common factor and least common multiple. Working in small groups, they solve problems using the greatest common factor and least common multiple. Full Review »
- Grade Range
- 5th
- Rating
Students solve problems by choosing strategies, explaining their reasoning, making calculations, and checking results. They are given a hundreds chart, students find all the prime numbers up to 100. Students work in groups of three or four to find other rules for identifying composite numbers. Full Review »
- Grade Range
- 5th
- Rating
Students demonstrate rounding numbers to a sensible level of accuracy and in context. They discuss rounding numbers for newspaper headlines, complete a table of grocery items that need to be rounded, and observe and demonstrate various exercises independently and as a class. Full Review »
- Grade Range
- 6th - 12th
- Rating
Students read "Gandhi Says She 'Must Humbly Decline' to be India's Premier" from The New York Times and discuss Sonia Ghandi's electoral victory and her response. Students then break into groups and research the past 50 years of India's political history and create visuals or written scripts for an oral presentation. Full Review »
- Grade Range
- 6th - 12th
- Rating
Students solve problems from a New York Times math quiz related to an article about mathematician Dr. Terence Tao. They then prepare their own math quizzes for which solutions must be expressed in prime numbers. Finally, they consider how they use math in their daily lives, and prepare math problems based on one of their findings. Full Review »
- Grade Range
- 8th - 10th
- Rating
Students examine a Babylonian clay tablet and the mathematics found on it as a catalyst to investigate a variety of mathematical ideas. They produce and work with prime numbers. Students classify numbers as whole, integer, rational, or irrational. They use Heron's method to calculate square roots. Full Review »
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