Updating Courses for Accessibility

First, I would highly recommend you review our webinar on this exact topic. You can find it here: https://yukonlearning.com/webinars, titled "My Course Isn't Accessible, Now What?"

You are right - it's hard to estimate the level of effort without more details or seeing the existing course. However, to hit an Advanced Level AA compliance based on the mandate, you'll want to consider everything you've learned about accessibility: not just Closed Captioning and color contrast. You'll want to think through the rebuild of slides that use non-compliant interactions (like drag and drops and hotspot interactions), updating potentially ableist language throughout the content (which would impact the audio narration and Closed Captioning as well), adding focus order to each slide (to notify the screen reader of the important screen elements versus decorative elements), and then testing the updated course (either with a focus group/learner or using a screen reader tool).

In case it helps, I've also attached our Levels of Accessibility chart that shows what we consider for an Advanced Level AA compliance build. In addition, this Articulate article can be really helpful: https://access.articulate.com/support/article/Storyline-360-How-to-Design-an-Accessible-Course.

For time estimates, I would err on the side of being more conservative with your level of effort. Maybe think about using 50% of the course duration as your benchmark for estimates. For example, I would dedicate approximately 15 hours to the conversion of a 30-minute course. Again, every piece of content is different - so some may take longer and others not as long. And, after you've mastered the updates and worked through a few, I bet you gain efficiency, meaning this estimate could come down to more like 30% of the course duration (or in this example, 10 hours per 30 minute course).

Thanks and hope this helps!