For several months we've been watching how the students have been doing, how the course has been going, and awarding certificates. It's been great! Some have already vanquished A2 and are now ready to throw themselves into the next level, B1. We have added auxiliary calculations and Vickrey as level B units, while at the same time we have made available certification for B1 - Intermediate, so students will be able to hang another certificate on their walls. Opportunity for further certification: A2 - Pre-Intermediate.