You built your course for everyone. Not everyone is able to use it, and it’s the little things. A PDF their screen reader couldn’t navigate. A caption that garbled every technical term. An image that taught them nothing. You didn’t build these barriers on purpose, but they’re there.
The learners hitting these barriers aren’t complaining — they’re simply leaving. No email, no explanation. Just gone.
Inaccessible design doesn’t announce itself either. It quietly closes the door on the people you built this for. Learning how to make online course materials accessible starts with knowing where those doors are. Most of them are easier to open than you think.
Your PDFs Are the Biggest Gap in Your Course Accessibility
Exporting a Word document straight to PDF and uploading it to your course platform isn’t the final fix. Accessibility just isn’t packaged automatically in that export. What a screen reader needs is structure. Heading styles (H1, H2, H3, etc.) are what give a PDF its skeleton. Without them, a screen reader has no way to understand what’s a title, what’s a section, and what’s body text. It’ll read everything in one unbroken wall of text. Or nothing at all.
Use proper heading styles in your source document, add alt text to every image and diagram, and re-export. For older files that were originally scanned documents, making scanned PDF documents accessible requires a slightly different approach, but it’s more straightforward than most people expect. Retag, not rebuild. If your backlog is large, PDF remediation services for course materials exist precisely for this, so you’re not alone.
How to Add Captions to Online Courses – And Why Auto Isn’t Enough
Most course platforms produce auto-generated captions, and they do make your life easier— to a point. Sure, most of those captions are right about 80 percent of the time, and that sounds reasonable until you think about what the other 20 percent looks like. Discipline-specific vocabulary, proper nouns, and technical language, can all create many inaccuracies to be truly reliable. For accessible learning, accurate captions aren’t a nice-to-have feature, but a bare minimum standard.
Go through your videos and manually correct the auto-captions. This fix takes more time, but is worth it. Students who rely on captions feel your course’s inclusivity and authority here the most. While you’re there, check whether any of your tutorial videos demonstrate a lesson or concept silently on screen without narrating it out loud. A learner who can’t see what is happening has no way to follow along. Simply add voiceover narration where the visuals are doing all the work, and no one is left behind.
Missing Alt Text Is Missing a Lesson in Your E-Learning Design
Alt text is the written description that accompanies an image so assistive technology can read it aloud when a learner can’t see the visual you planned. Without it, a screen reader either skips the image entirely or reads out the filename; if your filenames look anything like most people’s, you know that “image_final_v3_FINAL_final.png” communicates nothing meaningful.
Work through your course image by image. Decorative images that add no information should be marked as decorative so screen readers skip them cleanly. For charts, diagrams, and infographics that carry actual content, write descriptions that convey what the image means, not just what it looks like. A common mistake is for alt text to describe a chart showing a sales trend as “a bar chart in blue” and not indicate the trend itself.
Color Contrast Is a Course Accessibility Problem Nobody Talks About
Course branding is so often developed with aesthetics in mind and unfortunately, with accessibility as an afterthought. Soft grey text on a white background looks quite elegant, no doubt. It also frequently fails the 4.5:1 contrast ratio that inclusive education standards require for readable text. Light blue buttons with white labels. Subtle watermarks behind body copy. These are everywhere, and most course creators don’t realize them until they look for it.
Run your course through a free contrast checker. You’ll likely find a few things that need a darker shade or a heavier weight. This is good feedback, and it means you’re on the right track. While you’re at it, check whether you’re using color alone to communicate meaning anywhere. Using exclusively red and green to indicate correct and incorrect quiz answers can be invisible to deuteranopia, a common form of color blindness that affects red-green vision. A text label alongside the color fixes this in seconds.
Accessible Learning Means Every Learner Can Navigate Your Course
The last thing worth checking is how a learner would move through your course using only a keyboard. No mouse, no trackpad, just a screen reader. Can they tab through the navigation of your webpages and PDFs in a logical order? Do your module titles make sense out of context without visual cues? Does your platform’s built-in accessibility actually work the way you assume it does?
Platform limitations mean some of this is outside your direct control, but where you *can* add clarity, add it. Module titles written to be clever and catchy can become descriptive without losing personality and voice. Instructions that presumed or even relied on visual context can be rewritten to stand on their own. These are the little things, small changes that open the door a little wider for every learner who walks through it.
Here’s the Thing
None of this requires a rebuild. It doesn’t require a developer or starting from scratch. It doesn’t require an IT team or certifications to implement. Course accessibility and inclusive education point in the same direction: making sure what you’ve already built actually reaches everyone it is meant for. WCAG, ADA, and Section 508 all agree. And so do the learners who until now, quietly closed the tab when they hit a wall you didn’t know was there.
Run the audit. Fix the gaps. Your course is closer, and the threshold friendlier than you think.
