where's the vocabulary tab with verb conjunctions and meanings? and the explanation notes during lessons are gone as well.
Hi RowanAhmed, both of those have been removed with the redesign, although the vocabulary tab is being improved and will be brought back to the site soon.
For a helpful list about the changes that have been introduced since the redesign, check out this awesome post by LauraGjovaag (http://www.duolingo.com/comment/1546916).
For answers about everything Duo, check out the ”A Guide to Finding Duolingo Guides” series (http://www.duolingo.com/comment/1278938).
Edit: By explanation notes, do you mean the discussions for the skills, or the Tips and Notes section. The topic discussions have been removed, but the Tips and Notes section should still be there in topics where it was already present.