Accessibility

What this page covers

This page covers www.contemplanda.com and the sample lessons on it. It describes how the lessons work with the reading tools built into web browsers and with other assistive technology, through the lesson player, the part of our software that shows each lesson. Our courses use the same lesson player wherever a student takes them. This page does not cover direct.contemplanda.com or the websites that schools run.

This page states only what we have tested or confirmed in the lesson player's code, and it names what we have not tested. Our goal is to meet the Web Content Accessibility Guidelines (WCAG) 2.2 at Level AA. This website and its lessons have not been audited against them, and we do not claim that they meet them.

Reading tools in your browser

On October 17, 2026, we opened a lesson in Microsoft Edge's Immersive Reader, in the view a student sees. Immersive Reader showed the lesson itself, not the course page behind it.

That test also found three problems, which we fixed on October 20, 2026:

• Immersive Reader started the lesson with the words "Lesson menu" and a step counter such as "Step 3 of 4".
• It showed each formula twice, once as math and then again as plain text, in which fractions, powers and some symbols could come out wrong.
• It showed a figure without its written description.

Immersive Reader now shows each formula once, keeps each figure's written description, and no longer starts a lesson with "Lesson menu" and the step counter. A formula with an equation number can still appear twice. We checked each of these changes in Microsoft Edge's Immersive Reader, on copies of our sample lessons, before the change went live, and on October 20, 2026, automated tests in Microsoft Edge confirmed that the same changes are in place on the sample lessons on this website.

We have not tested the lessons with Edge's Read aloud, Chrome's Reading mode, Firefox's Reader View, or the read-aloud features of phones and tablets, such as Speak Screen on an iPhone or iPad.

If a reading tool leaves out a figure's description, press the Show description button next to the figure, and the description appears on the screen as ordinary text.

How the lessons are built

Headings

Titled boxes in a lesson, such as "What you will learn", a definition or a worked example, are marked as headings, for screen readers that move from heading to heading.

Pictures and diagrams

The written description of a picture or diagram sits in the page right after it. On the screen it stays hidden until you press Show description, but it stays in the page for screen readers. If a picture cannot load, its description is shown in its place.

To see a picture, map or diagram larger, click it, or move to it with the Tab key and press Enter or Space. It opens across the full width of the window, with its caption and description. On a phone, a wide diagram stays large, and you move it sideways to see the rest. Close or the Esc key takes you back to the figure in the lesson. We checked this on a sample lesson on this website on October 18, 2026.

Formulas

Each formula is also written in MathML, a standard format for math that some screen readers can read aloud.

Graphs

On the graphs a lesson draws, each line color has a contrast ratio of at least 3 to 1 against the graph's white background, and the legend uses the same colors as the lines. We have not checked how graphs appear if your device or browser inverts colors.

Keyboard

Each dot under a lesson's progress bar is a button: move to the row of dots with the Tab key and press Enter to go to that step. The dots show progress by shape as well as by color, and the lesson menu explains each shape in words. An exercise that has keyboard shortcuts lists them under Keyboard help.

Tests

In a test, pressing Enter in an answer box does not submit your final answer. You submit with the Submit final answer button. If you press Enter, this message appears: "In a test, Enter does not submit. Press the Submit button when your answer is ready." Outside tests, Enter still checks an answer.

Motion

If your device is set to reduce motion, lessons show no confetti, and other celebration moments appear without animation. You can also turn celebrations off in the lesson menu. On the other pages of this website, some sections fade in as you scroll to them; with reduced motion they appear at once.

Videos

Lesson videos play in YouTube's own player, inside the lesson. For screen readers, each video is named by its title. The video controls and any captions come from YouTube, not from us. If a video does not play in the lesson, the "Can't play here? Open on YouTube" link under it opens the video on YouTube in a new tab.

Automated checks of this website

On October 20, 2026, we ran axe-core 4.13, an automated checker, on every page of this website, including the sample lessons, for the WCAG 2.2 Level A and AA rules it can test, with the browser set to reduce motion. It reported no problems. We also checked that every page fits a window 320 pixels wide without scrolling sideways, which is how a page looks at 400 percent zoom in a window 1280 pixels wide. Automated checks find only some kinds of problems, so they are not a full review.

Known limits and what we have not tested

We have not tested the lessons with a screen reader, such as JAWS, NVDA, Narrator, VoiceOver or TalkBack, or with a braille display.

Apart from the window-width check above, we have not tested the lessons with the page zoomed, with larger text set in the browser or on the device, or with the contrast themes in Windows.

Some math and science questions ask you to type math into an equation editor or to place points on a graph, and we have not tested these with assistive technology.

Tables in lessons mark their column headings for screen readers, but not their row headings.

We have not reviewed the captions of the lesson videos one by one.

Try a sample lesson

The sample lessons on this website use the same lesson player as our courses, need no account and keep no record of your work. You can open them with your own reading tools and assistive technology to see how a lesson works for you.

Tell us about a problem

If something in a lesson does not work with the tools you use, write to us at info@contemplanda.com. It helps to tell us the course and lesson, your device and browser, and the reading tool or assistive technology you use. Our privacy policy describes what we keep when you write to us. We reply within five business days.