Back button

Hi all - I'm developing a course which requires all elements on a page to be clicked before the user is presented with the NORMAL state button to continue. (I'm not using default nav). The issue I have is that if for any reason the user clicks back... they have to click everything again in order to continue... Has anyone come across this pattern before? Is there a way for SL2 to remember that the page has been clicked through and that the user can return to the page without having to click everything again?? Any help would be greatly appreciated. Thanks!