Universal Design for Learning

What Is Universal Design for Learning?

Universal Design for Learning (UDL) is a research-backed framework for designing courses, materials, and assessments that work for the widest possible range of students — not just those who happen to fit a narrow default. The term comes from architecture: universal design in buildings (think ramps, automatic doors, curb cuts) removes barriers for people with disabilities but ends up benefiting almost everyone. The same logic applies to teaching.

UDL was developed by researchers at CAST (Center for Applied Special Technology) and is grounded in cognitive neuroscience. Its central premise is that there is no such thing as a "typical" learner. Students vary enormously in how they perceive information, how they engage with material, and how they best demonstrate what they know. A course designed with only one type of learner in mind will create unnecessary barriers for many others.

Crucially, UDL is not the same as disability accommodation. Accommodations are individual, reactive fixes — provided after a student discloses a diagnosis. UDL is proactive and universal: it builds flexibility into the course design from the start so that fewer students need to request exceptions, and all students learn more effectively.

The Three Core Principles of UDL

CAST organizes UDL around three principles, each addressing a different dimension of learning:

1. Multiple Means of Representation — Present information in more than one format. Students differ in how they perceive and process content: some learn best by reading, others by watching or listening, others through hands-on engagement. Offering content in multiple formats removes barriers without lowering expectations.
2. Multiple Means of Action and Expression — Give students more than one way to demonstrate what they know. A timed written exam is one method, but it disadvantages students with processing differences, test anxiety, or language barriers — even when they understand the material deeply. Flexible assessment options let students show genuine learning.
3. Multiple Means of Engagement — Provide multiple ways to motivate and sustain student interest. Students differ in what captures their attention, what feels relevant, and how they manage challenge and frustration. Building in choice and relevance increases engagement for everyone.

Why It Matters Beyond Disability

UDL benefits a much wider range of students than those with formal disabilities:

• Students with disabilities (learning differences, ADHD, chronic illness, mental health conditions, sensory or mobility impairments)
• English language learners, who may process text more slowly or struggle with idiomatic academic language
• First-generation college students, who may be less familiar with unspoken academic norms
• Working students and caregivers, who need more flexibility in when and how they engage with material
• Students from varied cultural backgrounds, whose prior knowledge and communication styles differ from a dominant norm
• All students, who benefit from clearer instructions, better-organized materials, and meaningful choice

In practice, when you remove a barrier for a student with a disability, you almost always make the course better for everyone else too.

Simple Ideas for Making Your Course More Accessible

You do not need to redesign your course from scratch. Small, intentional changes add up quickly. The ideas below are organized around common course elements.

Course Materials and Content

• Caption your videos. If you use video content — recorded lectures, YouTube clips, films — ensure they have accurate captions. Auto-generated captions have improved but still produce errors; review and correct them when possible. Captions help students who are deaf or hard of hearing, non-native English speakers, students in noisy environments, and anyone who simply processes text more easily than audio.
• Provide transcripts for audio content. Podcasts, recorded discussions, and audio files should have text transcripts available. This takes more effort but significantly expands access.
• Use accessible document formats. PDFs created from scanned images are often unreadable by screen readers. When sharing readings, use tagged PDFs, Word documents, or web-based content whenever possible. In Microsoft Word and PowerPoint, the built-in Accessibility Checker catches common problems.
• Choose readable fonts and sufficient contrast. Sans-serif fonts (Arial, Calibri, Helvetica) are generally more readable than decorative fonts. Body text should be at least 12pt. Avoid placing light gray text on a white background or other low-contrast combinations. Tools like the WebAIM Contrast Checker are free and fast.
• Structure documents with true headings. Use your word processor's built-in heading styles rather than just making text bold or large. True headings allow screen reader users to navigate documents efficiently and make content clearer for all readers.

Lectures and Class Sessions

• Post slides before class. Sharing slides in advance benefits students with visual impairments, students who process information more slowly, students who take notes differently, and students who miss a session. It does not reduce engagement — students who have the slides follow along more easily, not less.
• Speak clearly and repeat key terms. When introducing new vocabulary or concepts, say the term, write it (on a slide or board), and briefly define it. This benefits students with auditory processing differences, language learners, and anyone meeting the term for the first time.
• Describe visual content aloud. When showing a graph, image, diagram, or video clip, briefly describe what it shows rather than just saying "as you can see here." This is essential for students with visual impairments and helpful for everyone.
• Build in processing time. Pausing for 60–90 seconds after introducing a complex idea — or posing a brief reflection question — benefits students who need more time to process, and tends to improve the quality of participation for everyone.

Assignments and Assessments

• Write clear, explicit instructions. Ambiguous assignment prompts create unnecessary barriers, particularly for students who are less familiar with academic norms or who process language differently. State the task, the purpose, the format, the length, and the criteria explicitly. What seems obvious to an expert often is not to a novice.
• Provide rubrics in advance. Rubrics communicate expectations before students begin working, not just after they submit. They reduce anxiety, support students with executive function challenges, and tend to improve the quality of work across the board.
• Offer some flexibility in format. Where the learning objective permits, consider allowing students to choose how they demonstrate knowledge. A student might write an essay, record a short video, create an annotated bibliography, or deliver a brief presentation — all demonstrating the same underlying competency. You don't have to offer unlimited options; even two or three alternatives makes a significant difference.
• Offer flexible deadlines thoughtfully. Rigid same-day deadlines with no grace period create disproportionate barriers for students managing chronic illness, mental health challenges, or unstable work schedules. Consider building a short grace period into your policy (e.g., 24–48 hours with no penalty), accepting late work with a transparent penalty, or offering a small number of "free extension" tokens students can use without explanation.
• Design tests that assess understanding, not speed. Timed exams under pressure measure speed and test-taking stamina as much as content knowledge. Consider whether time limits are genuinely necessary for your learning objectives. If exams must be timed, ensure the time allocated is generous enough that most students are not racing. Open-note or open-book assessments, take-home components, or alternative formats often assess deeper understanding more validly.

The Syllabus and Course Communication

• Include a clear, welcoming accessibility statement. Beyond the standard institutional accommodation language, add a brief personal note inviting students to speak with you about access needs — whether or not they have formal documentation. This signals openness and reduces the stigma many students feel about disclosing.
• Explain your norms explicitly. Don't assume students know what "active participation" means, what a "short response" looks like, or how to email a professor. First-generation students and students from different cultural backgrounds may be working from different assumptions. The more explicit you are, the more equitable the course.
• Use plain, direct language. Avoid unnecessarily complex sentence structures in your syllabus and assignment sheets. Dense, jargon-heavy policy language creates barriers — especially for students who are new to higher education or reading in a second language.

A Note on Accommodation vs. UDL

UDL does not replace the formal accommodation process. Students with documented disabilities are still entitled to individual accommodations (extended time, alternative testing environments, captioning services, etc.), and instructors should engage supportively with that process. UDL reduces the number of accommodations students need to request by removing barriers proactively — but it does not eliminate the need for individualized support entirely.

Think of it this way: UDL raises the floor for everyone. Accommodations address needs that remain after the floor is raised.

Getting Started

If this feels like a lot, start with three things:

1. Post slides and materials before class — low effort, high impact.
2. Add captions to any video content you assign or create.
3. Add one welcoming sentence to your syllabus inviting students to talk with you about access needs.

From there, pick one assignment per semester to redesign with more flexible options or clearer instructions. UDL is a practice, not a destination — incremental improvement over time is both realistic and meaningful.

Additional Resources

• SensusAccess is a tool that aims to empower students with disabilities, promote independence and self-sufficiency, and support inclusive education. SensusAccess is integrated with Canvas, providing faculty and students with fully automated document conversion and remediation capabilities right at their fingertips.
• The Caltech Accessibility Services for Students (CASS) office

GenAI Usage Disclosure: This document was created with assistance from genAI tools. The content has been reviewed and edited by humans. For more information on the extent and nature of genAI usage, please contact the CTLO.