 These allow a teacher to control the sequence of learning interactions through a course based on various criteria which include student action, their grade and date for example. So let's turn that thing on and we're going to set up a sequence of activities that need to be accessed in a particular order by the student. So by way of example we'll set a learning interaction up so that the student needs to read a post made by a teacher in a discussion forum before they can access an assignment. They'll submit the assignment and receive a grade and then be able to move on and attempt a quiz. So let's work with the activities we've created already. If we go to the forum and update the settings and scroll our ways toward the bottom, activity completion, completion tracking, let's say show activities complete when conditions are met and the condition will be that we require the student to view the activity and it will be deemed as complete. So we've returned a course. Okay as far as dependency on that forum is concerned let's now go to the assignment, more update the settings there. So the activity completion condition will be based on the forum, it must be marked as complete and what we'll do with respect to activity completion and completion tracking will say show activities complete when conditions are met and will say that the student must receive a grade to complete this activity. Let's go to the quiz settings, the activity completion condition will be the assignment must be marked as complete, we will show the activity as complete when the conditions are met, the student will receive a grade for the quiz. So there we have it, we've set up a sequence of three learning activities, the conditional activities essentially and you can see two of them are shaded and that will be reflected to the student and the ticks alongside will indicate student progress and if conditions have in fact been met and marked off automatically by the system. Let's now log out as teacher, we're going to log back in momentarily as a student, so we go to the discussion forum firstly and we've viewed the post, so we return to see that activity has been marked as complete, if we now return to the course page we can see the assignment is visible and accessible, browse, upload and attach a file, what we will do is quickly return to the course page you can see the quiz is still unavailable because the assignment has not yet been graded by the teacher, so we will log out momentarily as the student and come back in as the teacher to grade the student work, so that's been graded, logging back in as the student, you can see the assignment has been marked as complete and the quiz is available, so all three conditional activities have now been marked as complete.