ActiveMath Mysteries

THIS STORE'S TOP-NOTCH WRITING AND DESIGN TEAM

DAVID B. SPANGLER wrote or inspired the entire series of puzzles in this store. He was active in mathematics education from 1972 until his passing in 2022. He taught at the middle school and community college levels, while continuing to teach math methods courses at the university level. In 1994, he co-founded ActiveMath Workshops for teachers. Over the years, he helped develop math programs for major publishers, authored seven math books, wrote numerous articles for math education journals, and was a frequent speaker at math conferences. David held a master's degree in education with an emphasis in mathematics from Northern Illinois University. David epitomized what good mathematics instruction looked and sounded like. His legacy will live on in the many lives his work and works impacted. His coworkers, Karen and Angie, will continue to update puzzles in this store.

KAREN S. CORDELL has been a trusted math educator/coach/consultant for 35 years. Her focus is development of resources that support efficacy, access, and equity for all students. She has taught middle school and high school mathematics and has planned and delivered engaging lessons that helped all students build conceptual understanding through varied reflective learning activities. Karen has created both formative and summative assessments. Her master's degree in educational leadership is from The College of New Jersey.

ANGIE SELTZER has 30+ years of experience in math curriculum writing, editing, and instructional design. She has been a supervising editor of major textbooks, assessment resources, and technology supplements. Angie has taught at the middle school level and tutored students of all ages. She has a master's degree in mathematics education from The Ohio State University. Angie has her own TpT Store with thousands of 5-star reviews on games to promote math sense! (www.teacherspayteachers.com/Store/K8mathsense)

STORE CONTRIBUTIONS BY THE TEAM
David and Karen were co-authors of more than 130 Math History-Mystery Puzzles in this store. Angie designed the covers, previews, correlation charts, and other elements for Math History-Mystery Puzzles.

READ MORE ON LINKED-IN
www.linkedin.com/in/karencordell
www.linkedin.com/in/angie-seltzer