This example, we're going to go through how a multi-part where the children are variant can be used where user do not select which child that they are dumped into, but instead the system does. So I'm going to go to this multi-part and notice that it has three children. And then when I go to the multi-part setting, notice that it says treat children as variant, but it is random select. If I click on this, it will have been user select, but I'm going to click on it again to back to random select. So what this means is when the user opens up this course, they will only get one child instead of all the children. And the one that they get out of all the children is not based on user selection, but the system is going to randomly select one for them. This use case is perfect if you have multiple exams that are statistically the same, but you want user to take a different exam randomly out of, let's say, one out of four exam you have available, one out of three, so that it discards cheating. But instead of use question pool type of exam, this mechanics will ensure that the exam they are randomly select into have similar difficulties and such. So let's see what it looks like when the system is set up to do it this way. So one thing I want to note is it has legalese, it has a three child, and notice that it's variant one, two, and three, but when the user see it, the user is not going to see the word variant, user is going to see whatever the display name is. So I'm going to navigate directly to the exam to show what it looks like. So here we go. So the user will see the legalese, and as soon as they accept, what they see is one of the child that the system has automatically dumped the user into. User actually didn't realize that there are actually two other options that he could have been dumped into. He only knew that he get dumped into exam, and only administrator knows that it's one of three. So if we go back to the admin, and we search for this user, we can see which version, which variant the system automatically run Robin the user into. So if I go here, you can see that I have run Robin the user into variant two. So if another user come in, they could easily have been taking the same course, but they could very likely dump into variant one or variant three. It is run Robin, but it is random. So this just another example of how you can use multi-part, where the children are variant, and instead of let user select which variant, you let system to randomly select which variant that the user will ends up with.

multi-part system

random child selection

course variants

preventing cheating

fairness