In 1962, seven mothers on the Main Line shared a conviction. They wanted something better for their children: an education grounded in the best international practices, one that dignified the child, cultivated independence, and went far deeper than memorization. Gladwyne Montessori School was born from that vision, and what those seven women built has outlasted everything they could have planned for.

Today, children of those original students walk through the same doors. Grandchildren, too. And at the helm of the school they started is Dr. Hadley Ruggles, a fifth-generation educator who came to Gladwyne Montessori and never looked back.

“It’s a place you want children to grow up,” Dr. Ruggles says of the school’s sun-filled campus, tucked into the natural landscape of the Main Line. “That’s what pulled me here initially.”

A Mission That Has Never Changed

From the beginning, Gladwyne Montessori has been a mission-driven organization. The seven founding mothers weren’t simply opening a school. They were bringing a philosophy to life.

Montessori education emphasizes learning through inquiry, hands-on discovery, and deep interdisciplinary connection. Students aren’t sorted into rigid tracks. They build their own understanding with guidance, with mentors, and at a pace that respects their readiness.

That approach was unusual in 1962. It required explanation then, and Dr. Ruggles says it still does today.

“Everybody’s heard the term Montessori,” she says. “But understanding what it really means, what it means to cultivate independence, to create agency, to dignify a human being, that’s still a conversation worth having.”

One of the founders, Darcy Hall, recently visited the school in her 90s, traveling from upstate New York to see what Gladwyne Montessori has become. Dr. Ruggles describes her reaction simply: she was floored. The school had grown beyond even her founding imagination, now offering a complete Montessori journey from early childhood through sixth grade.

What Learning Actually Looks Like Here

At Gladwyne Montessori, a typical morning for a third grader doesn’t look like a typical classroom. Students begin with a work plan, setting their course across all their disciplines: reading, writing, math, and science. Then they go deeper.

Small group lessons are grouped by readiness, not grade. A third grader might work alongside fourth and fifth graders on a new math concept, or alongside second graders on a different skill. After each lesson, students practice independently and pursue passion projects that apply what they’ve learned in real ways.

Science starts early and goes deep. Chemistry, biology, and physics are introduced as early as first grade. They are not taught as isolated subjects, but as interconnected stories about the world.

“The periodic table isn’t just a rectangle with letters and numbers,” Dr. Ruggles explains. “Our students see the elements as part of a larger story, part of the cosmos, part of how the world came to exist. They have a deeper framework than most adults do.”

That depth is guided by a team-teaching model. Each student has a homeroom and three lead teachers with distinct specializations: humanities, math and sciences, and civics. Three additional supporting teachers work with students individually and in small groups. Every teacher also serves as a dedicated advocate for a specific group of students, ensuring no one falls through the cracks.

Pencils Over Pixels, Before It Was a Movement

“Pencils over pixels” has become a rallying phrase in education circles in recent years. At Gladwyne Montessori, it has simply always been the way.

The school is tech-intentional by design. Younger students learn to ask questions, develop inquiry skills, and build foundational thinking before any device enters the picture. Deliberate technology education begins around fourth grade, and even then, a device is a tool, never a replacement for a teacher. Main Line Parent explored this approach in depth in Childhood Uninterrupted: How Gladwyne Montessori Protects Focus in a Digital Age. 

“You have to teach the tool of the mind before you teach the tool of the device,” Dr. Ruggles says. “Whatever next wave of technology is out there, the question we’ll always ask is: is this what an eight-year-old actually needs right now?”

Gladwyne Montessori has been practicing tech-intentional education for more than 60 years, long before the wider conversation caught up. 

What Students Carry With Them

By the time Gladwyne Montessori students finish sixth grade, they are, on average, two years above grade level in literacy. Many have spoken on the floor of the UN Council building in New York City, advocating on issues like water rights and global education access. Graduates move into highly rated Main Line private schools and top ranked public schools with strong executive functioning skills, intrinsic motivation, and the confidence to ask deep questions.

“They know how to tackle big projects,” Dr. Ruggles says. “They know how to set out a plan. And they don’t wait to be told what to do next.”

Those qualities, she notes, are exactly what school leaders across the region are looking for.

“Since a lot of the work we did here was independent, it was pretty different from how in traditional school the teacher kind of just tells you what you need to do, but here we got to figure it out by ourselves. And I think that really helped us learn how to be independent and be able to problem solve by ourselves.” 

–S., High School student

The Legacy, Continued

The seven mothers who founded Gladwyne Montessori in 1962 believed students deserved the kind of rigorous, child-centered education that had long been the standard in classrooms around the world. They wanted their children to be curious, capable, and independent. They wanted something built to last.

More than six decades later, it has. And the women who shaped this school, then and now, are exactly the kind of influence Gladwyne Montessori has been fortunate to have.

“When you see a sixth grader speaking passionately about healthcare advocacy or the rights of girls across the world,” Dr. Ruggles says, “you remember that this is what learning is supposed to culminate in. We’re creating the people we want to be societal leaders.”

Families interested in learning more about Gladwyne Montessori can explore admissions here.

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Photos courtesy of Gladwyne Montessori School, as seen in the Women of Influence Guide.

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