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How Many Marbles in the Jar? Estimation in the Early Grades

Jennifer Taylor-Cox 

December 2001, Volume 8, Issue 4, Page 208

Abstract:
This article examines methods and types of estimation; and characterizes fruitful in-class estimation tasks by exploring the validity and possible extensions of "marble jar" estimation.

Keywords:
Pre-K-2
Article
Grades 3-5
Estimation / Approximation / Number Sense
Teacher
Student Work
Representation