Advancement is based on demonstration of skill, not time attended.

You can move onto the 2D when you pass the 1D test (which can be taken the first day you sign up if you feel you're skill level warrants the advancement). There is a written and a practical - but if you can pass both you can immediately move onto the 2D.

This is to ensure that everyone in the 2D has the same level of understanding - that way we don't have to reteach prior knowledge. There have been students that were able to advance pretty much right away, so if you want to and can test out, I'm all for it.