Different Levels for Marketo Certification

We have a lot of marketers that work with Marketo at our company. Varying from beginner to average usuage. There are only 3 superusers, including me. Saskia and I already have the certification. We would like our internal user group to be more active and more confortable with Marketo in order to leverage its potential. I think it would be a great idea to have different user profiles for the certification, but also for the university. E.g. admin/superuser level and a marketer user level. I would love if all of our marketers (>20) have a 'normal' Marketo user certification or at least proper training. Any ideas and suggestions on this?