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The Moroccan Earthquake and the Richter scale
Friday evening, September 8 th , a powerful 6.8 magnitude earthquake hit Morocco southwest of Marrakech. What does a 6.8 magnitude earthquake mean? How powerful was that? What...
Algebra
Number Sense
Grades 7–HS
Doubling your money
My friend and I were arguing about how long it would take me to double my investment amounts. How will your students figure this out? Are there any...
Algebra
Number Sense
Grades 7–HS