Be sure to include a form title and form description. If there are specific instructions for the form, include those in the description.
As with all accessible documents, remember to add alt text to any images, graphs, charts, etc. While Forms does not allow the addition of "alt text", you can add captions to any images that are added to the form. Utilize this in place of alt text. Remember to be concise while ensuring all necessary information is relayed.
After adding an image, a button with three dots arranged vertically will appear in the upper left corner of the image. Click this button to access a menu of formatting options. Click "Add a caption" and input your image description.
A significant portion of the population has some form of color blindness. It is important to not rely solely on color to convey the necessary information.
Partner color with other meaningful information like text, shape, or pattern.
Use high contrasting colors. If you're unsure if your colors contrast enough, check out WebAIM's online contrast checker.
One great way to check this is printing the presentation or document in black and white and reviewing - can the meaning still be understood without color?
Keep in mind that some themes may be too busy for some users and could cause distraction and anxiety. Sometimes, simpler can be better.
EquatIO can be used within Google Forms to make web-based quizzes that include math. If students also have EquatIO, they can use it to input equations or graphs as answers. To learn more, check out Making Math Accessible.