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His group had tried to assure that a representative sample of students in each country took last year's test, he said.
The latest Timss study, the world's largest review of math and science achievement, involved testing a representative sample of students in each country in 2007, the first time the tests had been administered since 2003.
But there is better evidence from the National Assessment of Educational Progress, a test given by the United States Department of Education to a representative sample of students nationwide.
Schumann and Eberle (2014) provide data on a representative sample of students of the German-speaking part of Switzerland.
Each district employs a two-stage, cluster sample design in order to attain a representative sample of students in grades 9-12 itsits jurisdiction.
The TIMSS sample is selected using a two-stage stratified sampling procedure to produce a representative sample of students from participating countries; schools are randomly sampled at the first stage and intact classrooms are sampled within each sampled school at the second stage (Joncas, 2008).
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The following student quotes constitute a representative sample of student written feedback on the course evaluations.
Student feedback has shown that the work is challenging, empowering, and fun (Supplemental Material 2 provides a representative sample of student reflections from the first primary literature lab), and they often refer on exams to topics from these articles when applying their knowledge to novel situations.
To determine norms, which are typically configured every seven years, test makers give exams to a representative sampling of students.
The federal exam, which is given every two years, uses what it calls a representative sampling of students.
Dearth of information regarding the burden of these factors and the efficacy of educational intervention in minimizing them among urban school-students of India called for a school-based, educational intervention involving a representative sample of these students and their caregivers.
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CEO of Professional Science Editing for Scientists @ prosciediting.com