Accessibility

Our approach

The site is designed with semantic headings, keyboard-accessible controls, visible focus states, descriptive link text, responsive layouts, text alternatives for meaningful images, reduced-motion support, and contrast-aware dark and light themes.

Using the site

• Use the skip link at the start of the page to move directly to the main content.
• Navigate links, buttons, previews, and expandable sections with a keyboard.
• Use your browser's zoom and text-size controls; the layout is intended to reflow on small screens.
• Use the theme button in the header to choose a dark or light presentation.
• Turn on reduced motion in your operating system to minimize non-essential movement.

Digital publication

The PDF is designed for common screen sizes and standard US Letter printing. Accessibility can vary by PDF reader and device. A later corrected edition may improve tagging, reading order, contrast, or worksheet usability without changing the core product.

Report a barrier

Use the support contact shown at checkout or on your receipt. Describe the page, device, browser or reading software, and the task you were trying to complete. Do not include payment card details or unrelated sensitive information.

Ongoing work

Accessibility is an ongoing quality practice. We prioritize issues that block access to product information, policy terms, checkout, delivery, or the core educational content.