Marilyn Frozē

Lead Primary Teacher

Ms. Frozē is one of Milwaukee’s most beloved Montessori teachers with over 30 years experience. North Shore Montessori School is proud to have Marilyn as lead of the Primary program. Children thrive on Marilyn’s upbeat, positive tone.

After completing her undergraduate degree in children’s theater from Carroll College she went on to earn her Association Montessori Internationale (AMI) degree from the Midwest Montessori Institute, studying under well-known Montessori expert, Hildegard Solzbacher. Marilyn has two grown Montessori educated children, and one much-loved dog, Mazie.

Ms. Frozē has designed a beautiful and well organized classroom complete with the full breath of Montessori materials per Association Montessori Internationale standards. The clean, uncluttered classroom lends itself to the "prepared environment" where the children are drawn to the materials, and curious about their work. Marilyn loves singing with the children, reading to them in the outdoor classroom, and eating afternoon snack out on the school's veranda overlooking the pond and fields. She finds her work immensely rewarding.

Shanya Perera

Lead Primary Teacher

With six years of teaching experience in Montessori, Shanya Perera strives to grow and foster a nurturing, learning environment. Having grown up in Sri Lanka, Saudi Arabia, and the United States, she was raised and taught in Montessori schools.  Upon graduating from Wheaton College in International Relations and Theology, she lived in Chicago for a few years before realizing her passion to teach Montessori. After returning to Sri Lanka and receiving her Association of Montessori International certification from Good Shepard Maria Montessori Training Center, she taught primary classes in Sri Lanka, Los Angeles and now Milwaukee.  In her free time, Shanya enjoys hanging out with friends, hiking with her dog Oreo, and exploring Milwaukee.

Amanda Riley

Lead Elementary Teacher

Ms. Riley is an Association Montessori Internationale (AMI) certified elementary teacher with experience as a Montessori classroom assistant, and lead teacher of both grades 1-3, and grades 1-6. She has a liberal arts degree from Sarah Lawrence College in Bronxville, New York, and a masters degree in education from Loyola College in Maryland. Ms. Riley has recently relocated to Milwaukee from Albuquerque, New Mexico with her family in order to accept the lead elementary teaching position at North Shore Montessori School.

Ms. Riley believes teaching in the 21st century to be a great and worthy challenge, one well answered by Dr. Montessori's vision of cosmic order, and the balanced relationship of humans to the natural world. Amanda spends a great deal of time with her children in the outdoors where they are able to directly apply their lessons. Class dynamics including cooperation, team work, kindness, and courtesy are highly valued and woven into everyday life. Ms. Riley aims to understand the individual learning style of each child, fostering respect, self direction, and a love of learning.  

Sarah Moscicke

Elementary Teacher

Sarah’s first exposure to Montessori education was as North Shore Montessori School’s wrap-around care provider in 2014. Intrigued by the Montessori approach, Sarah returned to school in 2015 to earn her Association Montessori International (AMI) diploma in elementary education from the Montessori Institute of Milwaukee, and a Masters in Education from Loyola University Maryland School of Education.

Sarah joined Ms. Riley teaching grades 1-6 in 2016 in the Elementary classroom at North Shore Montessori School. Her passion and overall demeanor are valuable traits in the Montessori classroom and help draw the children to the lessons. Ms. Moscicke is enjoying discovering each child’s unique gifts and interests as she tailors lessons to each child’s individual development.

Sarah is originally from the St. Louis area but graduated with an undergraduate degree in communications with a concentration in theater from Wheaton College in Illinois. She now resides with her husband in Shorewood.

Tracy Theisen

Head of School

Tracy worked as the school administrator and assistant to the director at a private Montessori school for five years. She was responsible for marketing communications, tours and enrollment, human resources, and many other operational aspects of running a school. Her past experience includes working at M&I Data Services and Northern Trust Bank. She holds a BS in Consumer Science from the University of Wisconsin-Madison and Master of Business Administration degree from Keller Graduate School. Tracy and her husband are parents to two children who attended Montessori school.


North Shore Montessori School, Inc.

Left to Right: Tyra Baumler, Tracy Theisen, Tamalyn Powell, Pat Matusiak, Arleen More O'Ferrall, Rachel Upton, Alejandra Siddalingaiah and Peter Fischer

Tyra Baumler
, Graphic Designer and Business Owner

Tyra earned her Bachelor of Arts in Graphic Design from Drake University and went on to work as an Art Director at M&I Bank in Milwaukee. Tyra then started Tessera Design in 1999 where she specializes in communications, design, and marketing. She has extensive entrepreneurial knowledge and communications experience.

Peter Fischer, CPA, Advisor to the Board

Peter Fischer is a Graduate of The University of Notre Dame. He has held many professional positions such as President and CEO of Medalist Industries Inc., an owning partner and chief financial advisor for Allen Edmonds Shoe Cop. and manager at Arthur Andersen & Co. in the consulting division. Peter has also served on numerous midwestern corporate boards including Investors Bank, Allen Edmonds Shoe Cop., Middleton Doll Co., First Bank, and Gehl, as well as several non-profit boards. He was a board member of Ozaukee Christian School and was the organizer and long-term board member of another successful non-profit Christian organization in the Milwaukee area. Later in his life Peter Fischer became an ordained minister. He is an expert in the area of finance and in building strong small businesses, and is eager to bring his vast experience to North Shore Montessori School. He has a personal passion for and appreciation for Montessori education through watching his 7 grandchildren, who have attended Montessori Schools across the country, and seeing their success.

Pat Matusiak, JD

Pat has a masters degree in educational psychology from the University of Wisconsin-Milwaukee, and worked for a time in vocational rehabilitation. While raising her son, Pat went on to earn her law degree from Marquette University Law School. She is currently retired from the practice of law, but is an active volunteer in several organizations. Pat and her husband have seen first-hand the benefits of Montessori education in their son who has had a successful career including working as a special advisor to the President of the United States.

Arleen More O’Ferrall

Bachelor of Science in Nursing, Master of Science in Nursing, Nurse Practitioner

Arleen attended Ursuline College and graduated with honors with a Bachelor of Science degree in Nursing. She then worked at Johns Hopkins Hospital in Baltimore achieving a subspecialty certification in critical care nursing. After moving to Milwaukee with her husband, Arleen earned a Master of Science in Nursing degree from the University of Wisconsin-Milwaukee. She is currently employed as a nurse practitioner in a private medical practice. Her roles include advising, mentoring and supervising staff. Arleen has vast experience as the mother of four children educated in the Montessori method. Arleen has actively run and participated in many school educational seminars, fundraising activities, and community participation events. She has been a parent on the Parent Teacher Organization (PTO) at another Montessori school with leadership roles.

Tamalyn Powell, Senior Vice President at BVK Advertising

Tam is currently Senior Vice President and Group Account Director at BVK. She joined BVK in 1997 after nearly 10 years at Columbia St. Mary’s as Director of Public Relations and Marketing for the four-hospital system in Milwaukee.  She also served as the media spokesperson and developed the hospital’s crisis communication plan.  In her current position, Tam’s responsibilities have included all aspects of marketing communications planning and strategies for multiple healthcare systems as well as for several colleges/universities across the United States. Tam has served on the Board of Directors of the Wisconsin Health Care Public Relations and Marketing Society (WHPRMS), most recently as past president.  She has been the keynote at a WHPRMS district conference and a presenter at the annual conference for the American Society for Health Care Marketing and Public Relations and a break-out presenter at the Forum for Healthcare Marketing and Strategy.  She is currently the Board President of Serve Marketing, a pro-bono marketing communications company dedicated solely to assisting non-profit organizations that benefit the community.

Alejandra Siddalingaiah, MD

Alejandra Siddalingaiah is originally from Colombia. She graduated from medical school in 1996 and worked for the Colombian government providing health services for the indigenous population of the Amazonian Rainforest in Colombia. In 2003 she completed her internal medicine residency at Bronx Lebanon Hospital in New York and worked at New York University for the department of Endocrinology in research. She has lived in the Milwaukee area for 10 years is the mother of two children ages 9 and 6.

Tracy Theisen, BS, MBA

Tracy worked as the school administrator and assistant to the director at a private Montessori school for five years. She was responsible for marketing communications, tours and enrollment, employee benefits, and many other operational aspects of running a school. Her past experience includes working at M&I Data Services and Northern Trust Bank. She holds a BS in Consumer Science from the University of Wisconsin Madison and Master of Business Administration degree from Keller Graduate School. Tracy and her husband are parents to two children who attended Montessori school.

Rachel Upton
, BA, M.Div.

Rachel has been a Montessori advocate since her first of four children started school in 2004. She was an integral part of the Parent Teacher Organization (PTO) at another Montessori school and contributed to the success of several fundraising events and parent participation groups. She graduated from Milwaukee Lutheran High School in 1993, (1997) BA in Biblical Studies (Psychology minor) from Evangel University in Springfield, Mo.  (2000) M.Div. in Theology from Regent University in Virginia Beach, VA.  Together with her husband Jason began a nonprofit called Key of David Min., Inc in 2000, which is still running strong today.


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Open House at North Shore Montessori School18-Feb-2016

On Sunday, February 21st, we invite prospective parents to come visit our beautiful Montess..

Parent and Child Share Night Success01-Oct-2015

Thank you parents who came and shared some time in the classroom while your children showed you ..

Last Night's New Parent Orientation22-Sep-2015

Thanks go out to all of the parents who attended last night's New Parent Orientation for Ms. Fro..

Father's Day Clean-Up Project a Huge Success!25-Jul-2015

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