thanks for that thoughtful answer. I fully understand that recursion might be pushing the envelope of your class. So, one thing to remember about Snap! lists is that you don't get an out-of-bounds-error when you access a list by an index that doesn't exist. Instead you get "nothing" or zero. Provided that you only want to check for increasing positive numbers, you might want to try something like this:
or do you think that rings are also beyond the scope of your class? I'm really unsure here, because I'm not a teacher myself. Maybe @bh can weigh in on this....
I'm not set to insisting that our numbers block also has to support counting down. And your pointing out that we also have reverse for lists in libraries is very valid. So let's think about this some more!