Version 3: Technical Issues

UPDATE (04/02/2018)
The widget reloading bug (item 2 below) is partly fixed in macOS 10.13.4. iBooks does not freeze anymore when you click 'yes, clear', but you need to close and reopen the widget in order to complete the process ( = to reset your answers).
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Please note two technical issues with version 3 interactive exercises:

1. The new pop-up exercises (added in version 3.1) require iOS 11.2 and higher to work properly on iPads and iPhones.
2. There is a widget reloading bug in macOS 10.13.2 and 10.13.3 (High Sierra) iBooks app. If you click on the trash icon (to delete your answers) and answer 'yes, clear' in the following dialogue, iBooks may freeze and you may have to force quit the app. Apple is aware of the issue, and it should be fixed soon. Until then, please follow the following steps if you wish to erase your answers:
   a. Click on the trash;
   b. Click once (only once!) on 'yes, clear';
   c. Quit iBooks from the menu bar (not with command-Q, it will not work);
   d. Restart iBooks;
   e. Go back to the exercise, your answers have been erased.

We apologize for the inconvenience, and thank you for your patience.