KP®Mathematics is a teacher-owned company that creates and provides math manipulatives, programs, and professional development, all of which lead teachers and students to develop new ways of learning and thinking.
Meet Kim of
KP®Mathematics
Kimberly Rimbey, Ph. D., has devoted her career to supporting districts, leaders, teachers, and parents as they transform teaching and learning experiences at all levels. A veteran classroom teacher and seasoned leader, Kim holds a Ph. D. in curriculum and instruction, a Master’s degree in educational leadership and early childhood education, and is National Board Certified in Early Adolescent Mathematics.
A recipient of the Presidential Award for Excellence in Mathematics and Science Teaching, Kim has authored and co-authored many publications, including Corwin’s Mastering Math Manipulatives and Meaningful Small Groups in Math. She also co-authored most of the KP Mathematics collections. Kim’s experiences as a classroom teacher, a mathematics specialist/coach, a mathematics coordinator, a Chief Learning Officer, and a sought-after national professional developer make her the versatile educator she is today.
Kim is an official trainer for Building Thinking Classrooms and KP Mathematics.
Meet the KP® Mathematics PD Team
Chryste Berda is a mathematics educator, consultant, and author with over 20 years of experience transforming math teaching and leadership across K–12 settings. As a district Mathematics Coordinator and former Director of Education Innovation in Mathematics for Maricopa County,
She leads strategic initiatives focused on student thinking and teacher empowerment. Chryste presents nationally on a variety of topics including math leadership and classroom instruction.
She also serves in leadership roles with the Arizona Association of Teachers of Mathematics. Passionate about creating classrooms where all students thrive as mathematicians, she brings a collaborative, research-based approach to support educators and education systems for lasting improvement.
Chryste Berda
Tara Fulton
Tara Fulton is a dedicated mathematics educator and leader with over two decades of experience driving instructional improvement and system-wide change.
She currently serves as a District Mathematics Coordinator and as the Professional Learning Chair for the Arizona Association of Teachers of Mathematics. An MQI-trained math coach through Harvard’s Center for Education Policy Research and a former Regional Director for the National Council of Supervisors of Mathematics, Tara brings deep expertise in building teacher and leader capacity.
Her passion for instructional improvement, coaching, and professional learning drives her commitment to fostering high-quality mathematics instruction.
Melissa Hosten brings over 25 years of experience in education and currently serves as Director of the University of Arizona’s Center for Recruitment and Retention of Mathematics Teachers.
She partners with educators and leaders to spark innovation in math teaching and learning. Melissa has led statewide efforts, such as supporting family math during the pandemic, re-engaging students through after-school programs, and rethinking high school math through real-world relevance.
Her passions include empowering girls in math and introducing data science to young learners. She’s a former President of Women and Mathematics Education and an active, award-winning leader in Arizona’s math education community.
Melissa Hosten
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