This article clearly defines the best practices for creating accessible PowerPoints, including:
- What to fix
- How to find it
- Why fix it
- How to fix it
Each best practice principle has step-by-step instructions and screenshots that guide you through the process. Did you know that using a PowerPoint template (built-in slide layout) ensures that a screen reader will read the elements on that slide in the correct order? If you change the template, the screen reader will read the elements on the slide in the order that these elements were added?
Read more about PowerPoint accessibility in Microsoft's Make Your PowerPoint Presentation More Accessible.