Part of the lesson content (for example, a button to submit answers, etc) does not display.
If your browser 'zoom' is not set to 100% (actual size), some pages may not show correctly. Please check that your browser is set to display at 100% (actual size). (In Windows, make sure your browser is active, and press CTRL+0 to set display to actual size.)
I can't finish any lessons. I can't move to the next page.
Please check that your system meets the requirements for your course.