The Team

Many people brought their expertise into this project. Their contributions are deeply appreciated.


Sara Woltjer

Sara Woltjer, third grade teacher at Dutton Christian School in Dutton, Michigan

Grades K, 1, and 2

Josh Bower  

Josh Bowar, assistant principal at Sioux Center Christian School in Sioux
Center, Iowa

Grades 3, 4, and 5

Tim Leugs

Tim Leugs, middle school teacher at Legacy Christian School in Grand
Rapids, Michigan

Life, Earth, and Physical Science; overview of lesson writing process


Susan K  

Susan Koppendrayer, middle school teacher at Calvin Christian School in
Edina, Minnesota

Next Generation Science Standards and ongoing consultation/education on the product

Albert Kok

Albert Kok, vice principal and middle school teacher at Beacon Christian School
in St. Catharines, Ontario

Biblical worldview integration and ongoing consultation/education on
the product

Additional experts

Doug Monsma  

Doug Monsma, director of learning of the Prairie Centre for Christian Education

Worldview integration using Throughlines

Tim Krell  

Tim Krell, interim superintendent of Bellevue Christian School in Bellevue, Washington

Science education and biblical integration

Jim Jadrich

Jim Jadrich, professor of science education and physics at Calvin College

Science perspective statement

David Smith

David Smith, director of the Kuyers Institute for Christian Teaching and Learning

Training in worldview integration

Project managers, editors, and other detail people:


Ken Bergwerff, assistant professor of science education at Calvin College

Editor for scientific accuracy


Rachael Heyboer, manager of curriculum product development for CSI

Project manager


Darryl Shelton, vice president of corporate development and innovation for CSI

Quality control 


Christina Van Eyl, corporate editor for CSI



Laura Stormo and Donna Huisjen



Credo Communications

Layout and design