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Lattice Multiplication
Overview:
"Lattice Multiplication" is another strategy to help multiplication make sense.  Fourth grade students demonstrate and explain the steps of lattice multiplication.


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Finding Prime Using Eratosthenes' Seive
Overview:
This podcast was created by a group of 5th grade girls after they investigated Prime Numbers.  The podcast gives background information about Eratosthenes and prime numbers.  Then the students take the audience through the process of finding prime numbers using the Seive of Eratosthenes.