A chapter does not open

Return to Course Home and choose the chapter again. If the problem continues, close and reopen the app and include the chapter number in your support email.

A quiz will not advance

Select one answer before choosing Next. To restart after completion, choose Retake Quiz. Quiz state is not uploaded or saved to an account.

A flashcard will not flip

Tap the card once. If touch interaction is unavailable, use keyboard focus and activate the card where supported by your device configuration.

Accessibility feedback

Please report any difficulty with text size, contrast, focus order, screen-reader labels, or touch controls. Include your Android version and device model when possible.

Advertising or privacy choices

On the website, use the privacy-options link supplied with the consent message. In the Android app, open Privacy Options from the app menu when it is available. If either control is missing or an ad blocks study navigation, contact support and include your country and device type.