Accessibility
Accessibility Statement
This project was built so that its content, diagrams, and interactive parts can be used with a screen reader, a keyboard, or a small screen.
Accessibility features
Descriptive alt text
Every meaningful image has alt text that describes what the image shows. Images that are purely decorative use empty alt text so screen readers skip them. Diagrams and the delay-discounting chart also have written descriptions in the surrounding text.
Keyboard navigation
All links, menu controls, the interactive trigger example, the worksheet fields, and the print button can be reached and operated with a keyboard. A “Skip to main content” link appears when you press Tab at the top of a page, and focus outlines stay visible.
Color contrast
Text uses warm white on a dark charcoal background at contrast levels intended to meet WCAG AA. Meaning is never carried by color alone: selected states, chapter progress, and comparisons are also labeled in text.
Reduced motion
Animations are limited to small hover and transition effects, and they are turned off automatically when your device requests reduced motion. There is no flashing content, autoplaying video, or autoplaying audio.
Readable structure
Each page has one main heading, headings follow in order, content sits within a comfortable reading width, and the layout works from small phone screens up to large desktop displays without horizontal scrolling.
Privacy
The worksheet and the interactive example run entirely in your browser. Nothing you type or select is stored, sent, or shared, and the site does not ask you to create an account.
Reporting an accessibility problem
If you find something on this site that is hard to read, hard to reach with a keyboard, or unclear with a screen reader, please tell the author, Mansur Abdulahi, directly through the course. Feedback given during the course will be used to correct the issue in a later revision of this project.