Our Additional Programs

Additional School Care (ASC) follows basic Montessori principles in terms of encouraging children to help and teach one another, to follow projects through to completion, to create their own activities, and to care for their environment.

With some restrictions, parents can choose to have their children participate in ASC through Full-year Package ASC, Reserved ASC, or Drop-in ASC. Check out the details below.

 

Each semester, we offer Bayside Afternoon Classes for Full-Day Primary (4 years old and older) and Elementary students. 

The lottery for the Fall 2026 session opens on June 10, 2026. The lottery will be conducted on June 17 at 9:00 am. Refunds will not be issued once registration is confirmed.

Be sure to register for each class separately. For more about the lottery system, click the tab above.

How To Register

1. Log into your Parent Portal.

2. Go to the “Extended Care” tab.

3. In the “Participants” sub-tab, select your child's name for the correct BAC session and click "View Signups."

4. On the next page, make your BAC selection(s).

How to Opt Out or Cancel a BAC Session

1. Log into your Parent Portal. 
2. Go to the “Extended Care” tab.
3. In the “Participants” sub-tab, select your child's name for the correct BAC session and click "View Signups."
4. On the next page in the Session Calendar, click on the day(s) you wish to cancel and select “Opt Out.”

Primary

Outdoor Adventures with Kathy

For Full-Day Primary children 4-6 years old

• Tuesdays, 3:00-4:00 pm
• 8 sessions: Sept 15, 22, 29, Oct 6, 13, 20, 27, Nov 3
• Class minimum/maximum: 6/12
• Registration: $395

Join us for an engaging outdoor class where children explore their surroundings through sensory experiences. We'll set off toward Ring Mountain, collecting small treasures along the way for discussion. This class offers a chance for children to relax in nature and connect deeply with their environment, listening, feeling, smelling, and observing. 

Children are welcome to bring a snack to enjoy before class. Please wear sturdy shoes and bring a hat, a water bottle, and comfortable clothing that can get dirty.  

Kathy Winkler has been teaching young children for over 20 years. She is the Movement Specialist at MMS and taught kindergarten for 16 years before joining MMS. She holds a BA in Economics from UC Davis and a Multiple Subjects Credential from UOP. Passionate about the outdoors, Kathy enjoys trail running, ocean swimming, paddleboarding, and yoga. For questions, contact Kathy at kwinkler@marinmontessori.org.

Primary Spanish with Adriana

For Full-Day Primary children 4-6 years old

• Thursdays, 3:00-4:00 pm
• 8 sessions: Sept 17, 24, Oct 1, 8, 15, 22, 29, Nov 5
• Class minimum/maximum: 6/12
• Registration: $395

Our after-school Spanish program encourages self-directed exploration and hands-on learning, allowing each child to engage with the language in meaningful and developmentally appropriate ways. Through co-curricular lessons, students experience Spanish as a living language, integrated into stories, songs, and purposeful activities that nurture both communication and cultural understanding. Each session begins with a welcoming circle to build community and foster oral expression, followed by storytelling and guided lessons that introduce new vocabulary and concepts within a natural context. Children participate in songs, art projects, and sensorial activities that connect language learning with movement, creativity, and real-world experiences. Authentic materials, including Spanish literature, music, and foods, invite children to experience the richness and diversity of Spanish-speaking cultures. The goal is to foster a love for the Spanish language and its vibrant culture.

Adriana Romo brings 10 years of experience in early childhood education and holds a degree in Early Childhood Education from Diablo Valley College. Certified through the North American Montessori Center, she combines her Montessori training with a deep passion for language and literacy. Adriana first discovered her love for literacy and cultural expression while participating in a program that used Ballet Folklórico (a traditional Mexican dance) to teach Spanish. Over the past four years, she has integrated Spanish language and culture into Montessori environments, inspiring children to learn with curiosity, creativity, and joy. For questions, contact Adriana at aromo@marinmontessori.org.

Soccer with Joey

For Full-Day Primary children 4-6 years old

• Tuesdays, 3:00-4:00 pm
• 8 sessions: Sept 15, 22, 29, Oct 6, 13, 20, (No class Oct 27), Nov 3, 10
• Class minimum/maximum: 6/12
• Registration: $395

This lively after-school class will give your child the opportunity to learn soccer skills in a fun-loving, non-threatening environment. The main objectives of this class are to have fun, build confidence, and teach ball skills in a playful and Montessori child-oriented way. Games like "Catch the Coach," "Kick the Cone," and "Steal the Bacon" encourage children to kick and dribble the ball without becoming intimidated by the task. Cooperation and the joy of working with the ball and playing games with friends are always emphasized over competition, and there is no winning or losing in this class!

Joey Heusler has been teaching and coaching children and youth in physical education and personal fitness for over 30 years. She led the Primary movement program at MMS and a physical education program for the older Primary students for five years. Joey grew up playing soccer in Germany and has had a lifelong passion and love for the sport. If you have questions regarding the class, you may contact Joey at joeyloveswhales@gmail.com.

Primary Art with Melody

For Full-Day Primary children 4-6 years old

• Wednesdays, 3:00 - 4:00 pm

• 8 sessions: Sept 16, 23, 30, Oct 7, 14, 21, 28, Nov 4

• Class minimum/maximum: 6/12

• Registration: $395

• Materials fee: $25

Join Melody for a joyful after-school class designed for young artists! Each week, the children will engage in an exploration of color, shape, and texture through hands-on projects using a variety of media, including paint, modeling clay, and recycled materials. This class will focus on building their visual thinking skills and encourage their freedom of expression through open-ended process art. Together, we’ll practice, experiment, and enjoy making art in the garden!

Melody Ann Bausa is a Primary Support Specialist at Marin Montessori School and brings almost a decade of experience guiding and teaching children. As a creative enthusiast, she enjoys exploring different forms of art and craft, learning how they work, and experimenting with them. She holds a BA in Child and Family Development from San Diego State University. For questions about the class, please contact Melody at mbausa@marinmontessori.org.
 

Elementary

Lacrosse Skills with Amy 

For Elementary Children (1st-6th Year)
 

• Tuesdays, 3:30 - 4:30 pm 

• 8 sessions: September 15, 22, 29, October 6, 13, 20, 27, November 3 

• Class minimum/maximum: 6/16

• Registration: $395

Play the fastest game on two feet! Lacrosse with Coach Amy is open to all elementary-aged children and offers a fantastic opportunity to learn the FUNdamentals of lacrosse in a fun, creative, supportive, and engaging environment. Coach Amy's expertise and passion ensure an enriching experience for every child. From complete beginners to those with some lacrosse know-how, everyone will build confidence and skills while having a blast!

Led by the renowned Coach Amy McCleary, Founder & Owner of STICK WITH IT! Lacrosse, she is a three-time World Cup coach and a Hall of Fame inductee. This program covers cradling, ground balls, catching, throwing, and shooting through dynamic drills, interactive games, and friendly small-sided situations. Join us for Lacrosse and watch your child thrive on the field! For Inquiries, reach out to Amy McCleary at coachamymccleary@stickwithit.com. To learn more, visit https://www.stickwithit.com
 

Montessori Model United Nations with Kate 

For Elementary Children (5th and 6th Year Only)

• Tuesdays, 3:30 - 4:30 pm

• 9 sessions: Sept 8, 15, 22, 29, Oct 6, 13, 20, 27, Nov 3*

• Class minimum: 8

The Montessori Model United Nations program offers students the opportunity to dive deep into research on specific countries and topics of great global importance, develop and hone debate and presentation skills, and grow their capacity for collaboration. The program culminates in a trip to New York City to the Montessori Model United Nations international conference.

Each week, delegates will have a mandatory lesson during the BAC class and can use the remaining class time to complete follow-up work. During lessons, we will create a tri-fold style report for each country we represent, write position papers and speeches on global topics, and practice UN committee procedure in preparation for the conference. 

The program is open to all 5th and 6th-year students who are motivated to work independently and support the group experience. 

Schedule: The program begins Tuesday, September 8, 2026. Weekly MMUN BAC lessons are mandatory for students interested in participating. Weekly lessons will continue (except for holidays) until the conference in New York on the week of March 15, 2027.

Cost: We anticipate the total cost for the 2026-27 MMUN program to be between $4,000 and $5,000. The cost covers payment for staffing and all trip-related expenses: conference fees, accommodations, travel, and meals. After we complete our registration with the MMUN organization, MMUN Fees are non-refundable for any reason.
After registering for the class, you must also print and sign the following forms, which must be turned in at the first class session on Tuesday, September 8, 2026. MMUN registration is not complete until these two documents are received.

Financial Commitment Form
Student Commitment Statement
 

Spanish Immersion Cooking with Andrea

For Elementary Children (1st-6th Year)

• Wednesdays, 3:30 - 4:30 pm
• 8 sessions: Sept 16, 23, 30, Oct 7, 14, 21, 28, Nov 4
• Class minimum/maximum: 6/14
• Registration: $395
• Materials Fee: $25

This fall, students will explore the world through food while being immersed in Spanish in a hands-on, joyful way. Each session introduces recipes and culinary traditions from a different continent, with Spanish vocabulary for ingredients, quantities, and cooking actions woven naturally throughout. This fall, students will also build and color a map of Europe, labeling seasonal ingredients and capital cities along the way, and will take home a compiled recipe booklet at the end of the session.

Andrea is an AMI Montessori Guide with over a decade of experience as a Spanish and French teacher, preschool caregiver, and humanitarian volunteer. Shaped by a multicultural upbringing and Montessori pedagogy training in France, she brings a deep belief in the power of education to bridge cultures and enrich lives. For questions, contact Andrea at abeltran@marinmontessori.org.

Chess with Leonardo 

For Elementary Children (1st- 6th Year)

• Wednesdays, 3:30 - 4:30 pm 
• 8 sessions: Sept 16, 23, 30, Oct 7, 14, 21, 28, Nov 4
• Class minimum/maximum: 6/16
• Registration: $395

Marin Chess' after-school program introduces students to the exciting world of chess in a fun and supportive environment. Our classes cover key strategies, tactics, and game principles while helping students develop critical thinking and problem-solving skills. Chess challenges students to think ahead, analyze positions, and make strategic decisions, skills that benefit them both on and off the board. Through hands-on instruction and structured play, students sharpen focus, improve concentration, and learn to adapt in a dynamic and interactive setting. Join our chess program and experience the fun and excitement of the world's best strategy game!

Born and raised in Marin County, Leonardo Maso is a lead instructor with Marin Chess. He has taught at ten schools and worked with more than 150 students across Marin and Sonoma Counties. Leonardo focuses on helping each child strengthen their critical-thinking and problem-solving skills through hands-on learning. He encourages students to discover strategies independently through guided problem solving rather than being given the answers. Leonardo is passionate about creating spaces where students can have fun, build confidence, and grow as both players and thinkers. He is committed to ensuring that every class he teaches inspires curiosity, growth, and a lifelong love of learning. For questions about the class, please reach out to Marin Chess at stanley@marinchesscamp.com. 

Origami with Bridgette

For Elementary Children (1st- 6th Year)

• Wednesdays, 3:30 - 4:30 pm
• 8 sessions: Sept 16, 23, 30, Oct 7, 14, 21, 28, Nov 4
• Class minimum/maximum: 6/14
• Registration: $395

Origami is a rich intersection of creativity, geometry, mindfulness, and design. With each thoughtful fold, a single sheet of paper transforms into something unexpected—a soaring crane, a delicate blossom, or an intricate geometric creation. Each project becomes an invitation to cultivate patience, perseverance, and precision, while finding joy in creating something beautiful by hand. Whether children are new to the art form or have a budding interest in paper craft, they will be gently guided through progressively more complex folding techniques, encouraged to problem-solve, and invited to explore the cultural history of this timeless practice.

Bridgette brings a calm, meditative focus to her work. Whether she is tending to a community garden or guiding students through complex hands-on projects, she excels at helping children find a "flow" state in their work. As a Lower Elementary Assistant, Bridgette understands that the refinement of the hand is essential to the development of the mind; she champions the joy of the process, encouraging students to develop their own creative process while mastering the technical accuracy required for this classic art form. For questions about the class, please reach out to Bridgette at bturner@marinmontessori.org. 

Cross Country Running with Kate

For Upper Elementary Children (4th- 6th Year)

• Thursdays, 3:30 - 4:30 pm 
• 8 sessions: Sept 17, 24, Oct 1, 8, 15, 22, 29, Nov 5
• Class minimum/maximum: 6/14
• Registration: $395

Let’s get outside this fall and run! This Upper Elementary cross-country team will offer opportunities for children to step out of their comfort zone, build resilience, experience the meditative benefits of exercise, and feel the great sense of connection that comes from accomplishing hard things with their community. Children will have the opportunity to measure their progress as they explore movement through trails, relays, scavenger hunts, and more. 

Kate earned her bachelor’s degree in civil engineering with an environmental emphasis. She later earned her Association Montessori Internationale (AMI) Elementary diploma from Montessori Northwest and her master’s degree in Montessori education from Whitworth University. Kate began recreational running with laps around her preschool play yard. This progressed to a childhood filled with track and cross-country meets and eventually culminated in four years of competition as a heptathlete and middle-distance runner at her university. These days, she enjoys leisurely runs and casual road races. Kate’s goal is to share the rewarding experience of stepping out of your comfort zone, the sense of community found in individual sport, and exercise as an opportunity for meditation and reflection. 

Knitting with Ashley

For Elementary Children (1st- 6th Year)

• Thursdays, 3:30 - 4:30 pm
• 8 sessions: Sept 17, 24, Oct 1, 8, 15, 22, 29, Nov 5
• Class minimum/maximum: 6/16
• Registration: $395
• Materials fee: $25

Come spend an afternoon each week knitting with Ashley! All levels welcome. Learn skills like casting on, knitting, and purling, and how to knit in the round. Once the basics are mastered, the creative possibilities are endless! We will also learn technical information, such as the names and uses of various tools, types of yarn, and how to choose the right knitting needles for a project. This is a perfect class for beginners and for those looking for a relaxing, creative, and social gathering.

Ashley is a lifelong textile artist who works predominantly with crochet, knitting, and embroidery. She has been teaching at MMS since 2019 and recently completed both her AMI Elementary Diploma and Master's of Education in Montessori. If you have questions about the class, you can contact her at aanderson@marinmontessori.org. 

 

BAC Class Sign-up Registration

Registration Window: A designated one-week window will be announced for all sessions, during which all participating families can register their children for their desired after-school classes.

Lottery System: Once the registration window closes, a randomized lottery will be conducted for classes with more applicants than available spaces. All registered families for an oversubscribed class will have an equal chance of securing a spot, regardless of when they submitted their registration. You will automatically be placed on the waitlist when you sign up – please ignore your waitlist number. Your waitlist number is not an indication of being signed up. 

Notification: Shortly after the lottery, families will be notified of their child's enrollment status (enrolled or waitlisted).

Waitlist: A waitlist will be established for oversubscribed classes, and enrolled families may choose to add their child's name to the list in case of openings.

We believe this system offers several benefits, including:

Fairer Access: Ensures equal opportunity for all families to secure a spot in their desired classes.

Reduced Stress: Eliminates the need for families to rush and be online at specific times.

Transparency: Provides a clear and predictable registration process.