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Contents, IJPBL, 1/1
Peggy A. Ertmer and Alexius Smith Macklin

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Editors’ Introduction: Building and Serving a Problem-based Learning Community
Peggy A. Ertmer and Alexius Smith Macklin

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Overview of Problem-based Learning: Definitions and Distinctions
John R. Savery

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Goals and Strategies of a Problem-based Learning Facilitator
Cindy E. Hmelo-Silver and Howard S. Barrows

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Jumping the PBL Implementation Hurdle: Supporting the Efforts of K–12 Teachers
Peggy A. Ertmer and Krista D. Simons

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The 3C3R Model: A Conceptual Framework for Designing Problems in PBL
Woei Hung

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Preparing Teachers to Use Problem-centered, Inquiry-based Science: Lessons from a Four-Year Professional Development Project
James D. Lehman, Melissa George, Peggy Buchanan, and Michael Rush

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Professional Announcements
Peggy A. Ertmer and Alexius Smith Macklin