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A Mosaic Approach to GenAI in the Classroom

GenAI has had a chaotic impact on classrooms. While we haven't found a magic bullet to solve things, we have developed a number of imperfect tools. The following resources lay out a strategy for layering those imperfect tools and approaches to meet the challenges of this AI moment. These ideas are based in theory and classroom-tested—and aimed at helping faculty make teaching tenable, if not fun, again.

Updated August 2026
Chris Ostro headshot
Assistant Teaching Professor and Learning/AI Specialist
University of Colorado - Boulder, Division of Continuing Education
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Mosaic Approach

Change: The Magazine of Higher Learning

In this article, I detail my own journey with GenAI in the classroom, what's worked, what hasn't, and where it's led me. I call the collection of strategies I've adopted the "mosaic approach" to responding to AI. This will not solve every problem for every faculty member, but it highlights some strategies that might help in any classroom.

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Chris Ostro

The most fulfilling part for me is the emphasis on transparency. It relieves stress for everyone and also helps create an enforceable policy that isn't insanely time-consuming to enforce. Plus it's great to not be playing cops/robbers with the students anymore.

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AI literacy is a hard thing to teach students about for a variety of reasons. First, AI literacy is hard to teach because, frankly, we are not experts at it yet; we are lucky if we are just barely running ahead of the students, but in most cases they are running a bit ahead of us. Beyond that, it’s all so new. It’s not totally clear what skills we are even supposed to teach students, what will be valuable, and so on. That being said, over the past few months the literature has increasingly pointed toward teaching practical skills (such as prompt engineering, the differences between tools, etc.), critical inquiry skills (how to fact-check GenAI output, how to integrate it into other work, etc.), and relevant context of these tools (climate impact, how these tools work, data protection, etc.). Finally, AI literacy is hard to teach to nonsubject-matter experts.

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Mosaic Approach - Video

eLearning Consortium of Colorado

If you'd rather watch than read, here is a recording of one of my presentations on the mosaic approach.

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Chris Ostro

This one includes more in-depth examples from the classroom because they come up in the discussion.

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Generative AI Without Guardrails Can Harm Learning

Proceedings of the National Academy of Sciences of the United States of America

In this article, Bastani et al. allow groups of students to use different AI tools for a structured series of high school mathematics units and then compares results. The findings? There are better and worse ways to use AI for learning, students often opt for worse ways, but teacher guidance can direct them to the better ways. Teachers have a lot of agency here, and these findings inform my entire mosaic approach.

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Chris Ostro

I really appreciate the nuance this paper adds to these discussions. There are great ways to use these tools and with careful thought and deep investment of time/resources, we can make tools that help learning. However, haphazard or unintentional use of these tools has a sharp negative impact on learning. And regardless of what group a student was in, the use of GenAI consistently led to overestimation of learning. Lots of interesting takeaways for the classroom here, but ultimately it creates a clear incentive to being proactive on addressing GenAI.

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Generative AI Without Guardrails Can Harm Learning: Evidence From High School Mathematics

Proceedings of the National Academy of Sciences of the United States of America
Open resource

Generative AI is poised to revolutionize how humans work, and has already demonstrated promise in significantly improving human productivity. A key question is how generative AI affects learning—namely, how humans acquire new skills as they perform tasks. Learning is critical to long-term productivity, especially since generative AI is fallible and users must check its outputs. We study this question via a field experiment where we provide nearly a thousand high school math students with access to generative AI tutors. To understand the differential impact of tool design on learning, we deploy two generative AI tutors: one that mimics a standard ChatGPT interface (“GPT Base”) and one with prompts designed to safeguard learning (“GPT Tutor”). Consistent with prior work, our results show that having GPT-4 access while solving problems significantly improves performance (48% improvement in grades for GPT Base and 127% for GPT Tutor). However, we additionally find that when access is subsequently taken away, students actually perform worse than those who never had access (17% reduction in grades for GPT Base)—i.e., unfettered access to GPT-4 can harm educational outcomes. These negative learning effects are largely mitigated by the safeguards in GPT Tutor. Without guardrails, students attempt to use GPT-4 as a “crutch” during practice problem sessions, and subsequently perform worse on their own. Thus, decision-makers must be cautious about design choices underlying generative AI deployments to preserve skill learning and long-term productivity.

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Results from the Survey on Undergraduate Perspectives on AI at CU Boulder

CU Boulder Center for Teaching and Learning

This is a wide collection of data at my home institution, CU Boulder. They surveyed ~10% of the student population about a wide variety of questions related to GenAI. While CU is a specific institution, the data provides some insight into student use patterns and priorities at some colleges.

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Chris Ostro

Before designing a classroom policy, it's essential to know where students are coming from and how you can address their needs. This resource is the result of a huge data collection at my home university, University of Colorado, Boulder. Every institution is different but I appreciate the insight this gives into the worries and hopes many students have.

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Undergraduate Perspectives on AI at CU Boulder

CU Boulder Center for Teaching and Learning
Open resource

The rapid popularization of generative AI has fostered much unease in higher ed. On the CU Boulder campus, educators have implemented various generative AI policies, from banning this technology to integrating its use into activities and assessments. While many initiatives exist on campus to engage educators in conversation around these varied approaches, the Center for Teaching and Learning saw a need to understand the CU Boulder undergraduate student perspective on this emerging technology. The Educational Technology Research Assistant (ETRA) program was created to fill this gap. Specifically, our team of ETRAs conducted a mixed-methods research project to answer the following questions:

  • What are CU Boulder students’ attitudes toward and knowledge of generative AI?
  • How and why do CU Boulder students use generative AI in an educational context?
  • What generative AI training and policies do CU Boulder students want to see going forward?
  • How do CU Boulder students’ usage, knowledge, and attitudes toward generative AI vary by college, year in school, age, modalities of classes taken, international status, gender, race, and degree of comfort using English to communicate?
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Mosaic Approach - Resources

Christopher Ostro

This Google folder contains a variety of resources, including my "AI Disclosure Form," the policy text I use on my syllabus, the policy text I use on my Canvas explainer page, a variety of AI Literacy assignments, and more. All free to use and adapt under Creative Commons.

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Chris Ostro

I recommend starting with the "AI Use Disclosure Form." It's tailored to my course but hopefully it can help you find a useful policy and disclosure form for your own course. Then you can see the other documentation as to how I support it in my classroom, and hopefully that can inspire some ideas!

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