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Our Team

Each educator at Big and Tiny has outstanding experience, degrees in early childhood education, and a commitment to ongoing professional development. Above all, a passion for education and desire to make a difference in each child’s learning journey and life.




Keltse Bilbao

Keltse is a serial entrepreneur who previously co-founded "Plomo Shoes" and "The Ritualist". She holds a Master’s degree in Education Entrepreneurship from the University of Pennsylvania, a Master’s degree in Management from FIT, NY and a bachelors in Economics from the University of the Basque Country, Spain. She has over 20 years of experience in management, business development, and operations. She is passionate about early childhood education and is committed to making a difference in the lives of every family at Big and Tiny. Keltse’s passion is to travel and meet new people and cultures around the world.


Xavier Escobar

Xavier’s passion lies at the intersection of early childhood education and economics. He received a Bachelor’s degree in Economics from Harvard College, where he explored the challenges and vital importance of ensuring equitable educational opportunity. He now lends his statistical and financial acuity to help manage the company’s growth and daily operations. Xavier hopes to pursue a Master’s Degree in early childhood education or a Law Degree in the future. In his free time, he enjoys playing ping pong at his local table tennis club in Columbus, OH.


Saad Sahil


Saad has been working in the education space for over 12 years as a teacher, curriculum developer, principal and trainer. He is inspired by the concept of lifelong learning and frequently uses adult learning principles in creating content for young learners and vice versa! He holds a Master’s degree in education from the University of Pennsylvania and an MBA from LUMS, Pakistan. Saad will be leading teachers at Big and Tiny to ensure that our tiny scholars experience the highest standards of inquiry-based and experiential learning.


Adam Kritzer

Adam is an artist and educator.  His films have won awards, screened at festivals worldwide, and been released theatrically and on-demand.  He is also a published writer and exhibiting multi-media artist.  In 2016, Adam founded the Art Detectives to bring together his passions for education, neurodiversity and the arts.  He has worked with hundreds of students of all ages and abilities, helping them develop academic, social, and emotional skills while at the same time becoming better artists.  Adam holds a Master’s degree in education from the University of Pennsylvania.  He lives in Manhattan with his partner and their standard Schnauzer, Upton Sinclair. 





Lizelle Canque

Lizelle is a native New Yorker. She received her B.A. from CUNY’s Hunter College and completed her M.A. in Early Childhood Education and Special Education at Teachers College, Columbia University. She recently completed her Montessori Training through the West Side Montessori School Teacher Education Program and received a Montessori Credential specializing in Early Childhood Education from the American Montessori Society. In her free time she loves discovering new things in the many museums New York has to offer and cooking at home. She became a teacher because she loves to learn alongside her students and wants to nurture a foundation for learning that is fueled by curiosity and excitement.


Matt Steiner

Matt is an actor, clown, filmmaker and educator based in New York City. As an actor, Matt has been on two national tours, has performed Off-Broadway, and in film & television. As a clown, Matt trained with master clown teacher Pierre Byland in Ticino, Switzerland, with Jane Nichols and Chris Bayes in New York, and performs regularly with the clown troupe Logic Limited, Ltd. As an educator, Matt has 15+ years of experience designing arts-based curriculum and facilitating inquiry-based lessons at organizations such as Lincoln Center for the Performing Arts, Classic Stage Company, The Acting Company, Manhattan Youth, Marquis Studios, The Art Detectives, and more. Matt earned his BFA in Acting from California Institute of the Arts.

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Yaritza Perez

Yaritza is entering her 11th year of teaching, having worked in various school settings in toddler classrooms. She previously taught with the Blue School, Tribeca Community School, The International Preschools, Montclare Children's School, Tompkins School and Bank Street Head Start. She received a BA in Psychology with a minor in Early Childhood Education. In her free time, she loves to go to museums & art galleries, exercise and discover new books.


Birch Halterman

After studying film and visual art at Sarah Lawrence College, Birch found their true passion as an early childhood educator. In their seven years of teaching in Reggio Emilia-inspired schools, Birch has strived to create a classroom environment where all children feel welcome, supported, and free to be their authentic selves. Birch finds joy in working side by side with children as they grow and learn through play, art, community, and exploration of the world around them. They are currently working on their MS in Early Childhood Special and General Education at Bank Street College of Education. Birch lives in Brooklyn with their two cats and spends their free time cycling, cooking vegan food, knitting, and collecting records.

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Jessica Stromber

Jessica holds a Bachelor’s degree in early childhood development from CSULB and  has been working with young children for over 15 years. She is passionate about early childhood education and has developed robust strategies to best foster children’s growth.  She is committed to creating a safe and nurturing space for children as well as ensuring that all families in our community are taken care of.


Enjoli Littleton

With a Bachelor’s degree in early childhood education from CSULA, Enjoli has over 9 years of experience working with children. She first discovered her passion for teaching while working for both a private school and Head Start program during her time in college. Enjoli is committed to making childcare education a lifelong career and looks forward to working toward a Master’s degree in this field in the near future. In her free time, she loves to participate in sports activities and events.



Alejandra García

Alejandra obtained her Bachelor’s degree in Child Development from Cerritos College and University of La Verne. She has been in early childhood education for over 10 years and has experience working with all ages from infants to preschool. Her passion for teaching stems from the impact her own early childhood teachers had on her. Alejandra makes every effort to foster a classroom where children feel safe, invited, heard, understood, and loved. As a bi-lingual teacher with a diverse background, she aims to allow every child the opportunity to explore, play, and learn in their own individual way.


Natalie Díaz

Natalie is passionate about early childhood education and her role in laying the foundation of future learning for the next generation. She has been an early childhood educator for 6 years and every day is blessed to have a career where she is able to share in the fun,  exploration, and growth of each individual child. Natalie holds an associate’s degree and California State Credential in Early Childhood Education. As a native Spanish speaker, Natalie incorporates her language and culture into the classroom. In her free time, Natalie loves to dance and listen to music.



Stephanie Carrera

Stephanie is currently pursuing her Master’s degree in Special Education along with her Teaching Credentials. She currently possesses a Bachelor’s degree in Psychology with a minor in Sociology. She has two years of experience working with children with exceptional disabilities, in addition to volunteering her free time to mentoring and tutoring children. On her days off when she is not working with children, Stephanie loves to read, hike, and paint.


Sydney Lee

Sydney, who grew up in New Orleans, LA, is a recent college graduate from Washington and Lee University in Lexington, Virginia where she majored in Politics and minored in Poverty and Human Capabilities Studies. During her time in Virginia, she volunteered at the Yellow Brick Road Early Learning Center, where she developed a passion for teaching and working with children alongside enthusiastic teachers and caregivers. Outside of teaching, she loves to get outdoors and run, cycle, or swim. She believes that early childhood is one of the most critical stages of development and hopes to be an enthusiastic, caring infant educator.

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