Answer #1: Linden only (not TeaZers)
So you have your approval, what now?
(1) Class Approval: The next step is to get a class description approved by the Lindens. You will want to write a short description of your class, including the title and a few things that you expect the participants to learn during the class. This report must be emailed to [email]class@lindenlab.com[/email] before you hold your first class - but you don't have to wait for a reply.
(2) Personal Planning: Before holding your first class, you will want to be sure you are prepared for it. If you intend to have your students build or script anything during the class, make sure you have built or scripted it yourself several times. Write out detailed instructions in a notecard, ready to be copied and pasted during the class. (Make sure that each line is short enough to fit in the speech box - try copying and pasting any lines that you're unsure of ahead of time!) Try making any mistakes you can think of, to see what the results are and how to fix the problem (e.g. linking prims out of order, forgetting a semicolon in a script, not saving a copy of your avatar before working in appearance mode...)
(3) Hold Your Class! You do not need to wait for any sort of Linden approval before holding your first class. Once you have sent in your event description, you are free to post your first event on the calendar at
http://www.secondlife.com/events. Be sure to arrive early and be prepared to stay late if there are any questions. Bring a smile!

(4) Submit Your Class Report: When class is over, you need to send an email to [email]class@lindenlab.com[/email] with the total attendance, time, date, and name of the class. Be patient, and within a week you should receive your L$500. In the meantime, you can schedule more sessions of the same class, or repeat these steps with a new class description.
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Answer #2: TeaZers University
So you already have your Linden approval: how do you get a position at TeaZers?
(1) Attend Classes: Start attending TeaZers classes, if you don't already. If you are planning to apply as an instructor, make sure you inform your teachers and ask them to mark you as a trainee in classes you attend.
(2) Attend Instructor 101: As you mentioned in the original post, all TeaZers Instructors must attend a session of Instructor 101, at which time you will be able to pick up an application, as well as learn more about the hiring process and what to expect at TeaZers.
(3) Apply: Fill out and return an actual application for TeaZers. You will get a copy of the application as part of your Instructor 101 class, or you can always pick up an application in the TU Lobby.
The rest will be handled once your application has been approved. TeaZers instructors do not have to submit class descriptions or email reports, as the University has a standing arrangement in place to handle these things for you. As a TeaZers instructor, you will be able to choose from existing courses, or even work with the staff to create a new class of your own design. As with the rest of SL, the sky's the limit!
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Good luck!
