After years of being frustrated by students putting less-than-optimal effort into their classroom jobs, and after realizing how tiring it was to explain to students how to do their job after changing them every week, I decided to follow the example of a wise colleague and have students "apply" for classroom jobs and hold them for longer than a week.
In my classroom, students apply for their classroom jobs and have to be chosen or "employed." They then hold those jobs until halfway through the school year, when the application process is open again. This longterm "employment" allows students to work within their strengths and passions, yet also provides the opportunity to get "let go" if their work is not up to an acceptable standard.
This method of assigning classroom jobs gives students practice in being trained, gaining expertise, training others when jobs switch halfway through the year, and, for some, a lesson in perseverance when they begin to get tired of doing the same job. (Welcome to the real world, kid!)
Included in this document is my copy of the job application in Spanish that I use in my immersion classroom, as well as mini-signs I use on our classroom job bulletin board. I whittled down my jobs to five essential ones, but this editable document allows you to substitute your favorites as well as expand on what I use.