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Early Childhood Faculty

Lori Karmazin, Early Childhood Level Director



“Perpetuating the legacy of Dr. Montessori can only be accomplished through thorough teacher training programs. My work at CGMS allows me to influence the growth of Montessori around the world in an influential and positive way.” Lori has 30 years experience as a 3-6 classroom guide, has been a Teacher Trainer with CGMS since inception, and is the owner of Great Extensions Montessori. Lori holds a Bachelor of Arts in Psychology and received her Montessori 3-6 credential from CMTE/NY in 1990, and is DERS and MEFS certified. Located in Tulsa, Oklahoma, Lori enjoys landscaping, hiking, and visiting places of natural beauty.


Mary Colarullo, Early Childhood Practicum Coordinator



Mary has spent more than half of her life as a Montessorian. The philosophy has always rung true and she feels fortunate to have seen the fruition of the “three year cycle,” experienced the marvel of the Peaceful Classroom and the privilege to be loved unconditionally by the children in her care. Mary received her AMI 3-6 Credential in 1977 and spent 30 years in the classroom as a primary lead guide, mentoring interns through the years and serving as a guide and instructor for PHMA Teacher’s Training (AMS) in Palm Harbor, FL. After retiring five years ago, Mary joined CGMS. She has served our adult learners as a field consultant, taught at residential sessions, and as an online instructor. Mary has been the Early Childhood Practicum Coordinator for four years. Located in Fayetteville, North Carolina, Mary enjoys nature walks, gardening (she took Master Gardener’s Training in 2000 from UC Berkley), reading, writing, watercolor-flowers. She is a people watcher-especially children.



Jana Morgan Herman


“I believe that working with teachers during their spiritual transformation is one of the blessings of my professional life and I take my part in their journeys seriously.” Jana serves CGMS as an Online Instructor, Residential Session Instructor, Field Consultant and Practicum Advisor. She holds a Master’s degree in Montessori Education from St. Catherine University, and received her Early Childhood Montessori Credential (MACTE/AMS, MTEC San Fransisco) in 1997. Jana is a Teacher Educator in US and Asia with five MACTE organizations. She is on the Editorial Advisory Board at Montessori Life Magazine, is a Moderator/Admin for Montessori Teachers Facebook (the largest online group of certified Montessori teachers in the world), and is the co-founder and VP of the Kentucky Montessori Alliance. She is also a university writing and literature instructor, and a national and regional presenter. Located in Louisville, Kentucky, Jana enjoys camping, ocean watching, and hiking.



Monica Johnson


“I am honored to be in the presence of children every day. I believe in the goodness of all children and strive to free each one’s potential through respectful and engaging interactions in the prepared environment. I am committed to supporting adults who share the same values as well as those seeking education of such values. I believe that Montessori education is achievable in all settings where adults are willing to trust the process.” Monica serves as an Online Instructor, Field Consultant, and Practicum Advisor for CGMS. She spent 20 years in the Montessori environment as a Montessori guide and currently provides support to children and families in the Bester Elementary School catchment including in-school support and home visiting. Monica holds a Master’s Degree in Montessori Leadership from Sarasota University and received her AMS Primary Montessori Credential in 2002. Her experience includes grant based programs, mental health services, private school settings, non profit schools, inclusion programs, Public Montessori and Montessori Charter Schools. Located in Hagerstown, Maryland, Monica enjoys reading, volunteering at the local shelter, gardening, writing (children’s stories, poems), painting and making handmade paper for crafting.


Robin Little


“I feel that my career has come full circle. I was first blessed to serve the children that came into my life through the classroom. I am now privileged to share that experience and joy with teachers who will continue teaching the Montessori philosophy to next generation of children.” Robin has worked in the Montessori field as a guide, an administrator, and a substitute guide for over twenty years. She received her AMS Preprimary credential in 1990 and holds a B.S. in Business Administration. Robin currently serves as an Online Instructor, Residential Session Instructor, Field Consultant, and Practicum Advisor for CGMS. Located in Lago Vista, Texas, Robin enjoys reading, cooking, and golf in her spare time.



Shelby Hiken


“As a member of the CGMS team, I am dedicated to sharing Dr. Montessori’s Philosophy and Curriculum to inspire you to visualize and contribute to the cosmic task of creating world peace through each individual child.” Shelby serves CGMS as an Online Instructor, a Field Consultant, and a Practicum Advisor. She has been teaching children for 15 years and is the founding Member and Director of Primary Pedagogy at Nurturing Nest Montessori School in Columbia, MD. Shelby received her M.Ed. from Loyola University in Baltimore, MD and AMI Montessori Certification for 3 to 6 from Washington Montessori Institute. In addition to being a field consultant and as an instructor for teachers, she validates local Montessori Schools for MSM (Montessori Schools of Maryland). Located in Baltimore, Maryland, Shelby enjoys reading, knitting, Origami, going for hikes, yoga, and spinning.


Julie Dederer


“I strongly believe that the work I do affects the lives of others and, thus, influences future generations.” Julie has worked with CGMS since 2012. She serves as an Online Instructor, a Field Consultant, and a Practicum Advisor. Julie has been a Montessori Directress in Early Childhood and Elementary classrooms. She was a Professor at the Columbus Montessori Infant/Toddler Teacher Education Program and Primary Teacher Education Program. Julie also served as an Assistant Professor of Early Childhood Education at Ohio Dominican University. Julie received her AMS Primary Certification in 1996 from the Northeast Montessori Institute. She graduated from the State University of NY at Fredonia, NY, with a Bachelor of Science in Music Education and a Master of Science in Elementary Education. Julie spends her winters in Florida and her summers in Old Orchard Beach, Maine. She enjoys the beautiful beaches and flora and fauna of the North and South. Julie enjoys reading, cooking, singing, and traveling in her spare time.


Mary Glenn

“Montessori is a way of life and I am so thankful it has impacted my life.” Mary taught Early Childhood Montessori in Washington and Alaska (15 years) and Lower Elementary (6-9 year olds) for ten years. She is currently a Coach for all teachers in a Public Montessori School in Tacoma, Washington. Mary graduated from Seattle University with a BA in Education and an AMS Early Childhood Credential, later receiving her Montessori Lower Elementary certification. She holds a Master in Education with a Montessori emphasis. Mary currently serves as an Online Instructor, a Residential Session Instructor, a Field Consultant, and a Practicum Advisor for CGMS. Located in Tacoma, Washington, Mary enjoys traveling, outside activities, and family time.


Jamie Sellhorn

Jamie has been a guide in Infant/Toddler and Early Childhood classrooms. In 2006, she founded Montessori Garden Academy in Indianapolis, Indiana and currently serves on the school’s Board of Directors. Jamie holds AMS Montessori credentials at the Infant/Toddler and Early Childhood Level. She is currently an Online Instructor, a Field Consultant, and a Practicum Advisor for CGMS. Jamie did undergraduate work at Duke University in Family and Child Psychology and her graduate work at Indiana University in business and technology. She taught in several Waldorf Programs and did Waldorf Teacher Training at Arcturus in Chicago. Jamie has experience working with children with Autism and other special needs, having taught for several years at a Montessori School for children with Autism. In 2012, she completed an Orton-Gillingham certification through the Dyslexia Institute of Indiana.


Mel Megee

“From the first moment I stepped into a Montessori classroom I felt Montessori was the way children learn best. The classrooms were quite enriching, the materials, beautiful. The children had access to the best education based on child development. This type of education had been what my professors had been lecturing on for years.” Mel began working with children in 1979. She taught young children in a traditional setting during the day, and attended night school in the evening for many years. After working as a part-time assistant in a Montessori classroom, she earned her AMS Early Childhood Credential in 2003. Mel has been with CGMS since 2013 and serves as an Online Instructor, a Residential Instructor, Field Consultant, and a Practicum Advisor.