Beyond the Classroom Walls: Why Public Product is the Heart of Project Based Learning (PBL)
- Dr. Amber Graeber, Ph.D
- 1 hour ago
- 6 min read
The Power of the PBL Public Product
There is a moment in project based learning (PBL) that is unlike anything else in a school day. It is the moment when a student - who has spent weeks reading, writing, researching, discussing, and creating – publicly demonstrates what they know. Not for a grade. Not for a teacher. For the world.
That moment is the public product, and it changes everything.
What Is a Public Product In PBL?
In project based learning, a public product is a solution, product, or performance shared with a relevant audience beyond the classroom. It is not a worksheet, quiz, or a packet that lands in a gradebook and is never seen again. It is work that matters - work that is purposefully designed to be seen, heard, read, or experienced by others.
It is work that matters - work that is purposefully designed to be seen, heard, read, or experienced by others.
The public product is what distinguishes PBL from a good traditional unit. When students know from the beginning of a project that their work will be shared with an authentic audience, it raises the stakes in the best possible way. Students revise more carefully. They think more deeply about how to communicate their ideas. They practice. They prepare. They take ownership.
The benefits are not just motivational. Public product puts 21st-century skills like communication, collaboration, and creativity into authentic practice. It connects content and skills to real-world work – making learning engaging, affirming, and meaningful. It creates something shareable and invites feedback from peers, subject-matter experts, and other stakeholders in ways that a traditional classroom assessment simply cannot.
Why an Authentic Audience Matters in PBL
One of the most common questions educators ask about public products is: Does the audience really matter that much?
It does. Absolutely.
When students write only for their teacher, the teacher is the sole judge of whether the work is accurate, clear, or important. When students share their work with parents, younger students, community members, or subject-matter experts, something shifts. The student is no longer just completing an assignment. Students are explaining ideas. They are answering questions they did not anticipate. And in that process, they are demonstrating learning in ways that no multiple-choice or short answer test can capture.
The student is no longer just completing an assignment.
The audience also sends a powerful message to students about the value of their own thinking. Their ideas are worth sharing, and their work is worthy of an exhibition. That message, if repeated across a school year and a school career, shapes how students see themselves as learners.
A Real Example of Public Product in PBL: Windsor Elementary’s Second-Grade Museum
This fall, Applied Coaching for Projects had the privilege of supporting Windsor Elementary in the Des Moines Public Schools as they embarked on a schoolwide implementation of project-based learning. Windsor is a school committed to doing this work with joy and student voice at the center.
The second-grade teacher team - Kate Pimlott and Jennifer Wilson – worked in close partnership with their instructional coach, Laura Manroe, to build a PBL unit around their EL literacy curriculum and grade-level standards, with a focus on fossils. The unit had been a part of their curriculum for years, but this year they went further. Pimlott and Wilson built the unit with full PBL architecture, anchoring the students' learning in an inquiry process and culminating in an ambitious, authentic public product: an interactive museum.
Over the course of the unit, students engaged in multiple inquiry cycles. They sorted real fossils, made impressions with Play-Doh, pored over books about dinosaurs and earth changes, and observed and wondered their way toward deep understanding. A field trip to the Historical Museum and virtual tours of museum exhibits across the country gave students a vision for what high-quality exhibition looks like. And then they built one.
Students took on the roles of docents and curators. They created exhibits, wrote informational content, and practiced presenting their learning. They had agency in how they organized and displayed their work - and that agency was visible in the final product.
How a Public Product Showcases Deep Student Learning
When the museum opened its doors to the rest of the school and to families, the response was remarkable.
Associate Principal Claudia Lorentzen described the energy in the room as "undeniable.” Students from other grades entered with wide eyes, and teachers found themselves genuinely inspired. What made this public product exceptional, in Lorentzen's view, was that it showcased the depth of learning that had unfolded over the entire unit. The museum was not a decoration. It was evidence of learning.
The museum was not a decoration. It was evidence of learning
Principal Carrie Johnson observed students from other grades reading exhibit content carefully, comparing and affirming their own knowledge of fossils, and asking, " Can we do this?" Parents and caregivers shared that their children had been talking about the museum at home and practicing their presentations. One parent was struck by just how much the exhibit resembled a real museum and by the confidence their child had developed through becoming a curator of their own learning.
What Johnson and Lorentzen both noted was something that any educator who has watched a strong public product knows to be true: reading, writing, and speaking were not add-ons to the experience. They were woven through every piece of it, naturally and authentically.
Reading, writing, and speaking were not add-ons to the experience. They were woven through every piece of it, naturally and authentically.
What Makes a High-Quality Public Product in PBL
The Windsor second-grade museum did not happen by accident. It happened because a team of educators did the intentional and collaborative work that strong PBL requires.
Instructional Coach Laura Manroe described a team that was open-minded, creative, and committed to the process. The teachers planned together, reflected weekly during PLC, and adjusted based on what their students needed. They brought deep knowledge of their curriculum and standards, which gave them the confidence to flex the scope and sequence in service of a more student-centered approach.
The planning process was deliberate: working from standards, using the EL curriculum as a foundation, and building out inquiry cycles that gave students repeated opportunities to engage with the content before being asked to share it publicly. The launch included exploratory stations that had been developed the prior year and were preserved and incorporated into the museum itself as an interactive component for visitors. That decision honored both the prior learning and the new goal.
Manroe was clear about the iterative nature of this work. Already, she and the team are thinking about next year and about how science standards related to Earth's changes could deepen the museum even further, adding another dimension to what students know and share.
That is what a strong public product does. It does not just close a unit. It opens new questions.
How to Implement Public Product in Your Classroom or School
If you are building PBL in your school or classroom, do not underestimate the public product. It is tempting, especially early in implementation, to simplify it: to present it to the class or put it on the wall as a poster. Those are steps in the right direction. But the full power of public product is unlocked when the audience is real, when the stakes feel genuine, and when students have had enough time with the content to have something meaningful to say.
These second graders at Windsor had something to say. They had spent weeks earning their expertise, and when the museum doors opened, they were ready.
That readiness and confidence grounded in real learning is what public products make possible. And it is exactly what we are working toward, one unit, one school, one team of teachers at a time.
The full power of public product is unlocked when the audience is real, when the stakes feel genuine, and when students have had enough time with the content to have something meaningful to say.
Please note: All images in this blog are shared with permission from the school and participants. These images may not be reused or reproduced without written consent.
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