I thought I'd share this with the community as something to watch out for when restricting access to content using conditional activities. On one of our programmes, access to each topic section of the course is controlled week-to-week by taking a quiz. A member of staff had been checking activity logs and discovered a few students accessed content before they should have been able to see it. I eventually worked out that if you go into the gradebook (as a student), even if the section isn't yet available, any unhidden quizzes are shown as links. Clicking on those fulfils our conditional activity requirement (view rather than achieve grade). Our solution has been to add a date based Restrict Access (hidden) setting to the end of week quizzes - which means they don't show up in the gradebook until the date they should be available from.