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Explanation: This is the expression that would be used in Mexico as an equivalent for "homeroom teacher"; in other words, where you go in the mornings for attendance, morning announcements, pledge of allegiance, etc. I understand the "flex period" as an equivalent to what we used to know as "study hall". I think this is the one that goes along with the context of the document. I am from Pennsylvania, but I graduated long before this "flex" crap! Good luck!
This could refer to the teacher of a "flex period," rather than a teacher with no fixed classroom. In the high school context, especially in PA, it seems likelier. "Floating" teachers are more apt to be found in overcrowded elementary and middle schools.
24.3.1. Flex Teacher. A flex teacher is a teacher who does not have a permanent room assigned and who must change room assignments..) . ;)
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7 mins confidence: peer agreement (net): +7
profesor asociado/no permanente/auxiliar
Explanation: Literalmente, es "profesor flexible", es decir, el que no es el tutor del aula.
Section 24.3: FLEX ASSIGNMENTS
24.3.1. Flex Teacher. A flex teacher is a teacher who does not have a permanent room assigned and who must change room assignments whenever a track change is made at the site.
Hay tres tipos de profesores. En primer lugar, profesores a tiempo completo, quienes imparten la mayor parte de las asignaturas del Programa, dirigen las tesis doctorales y la mayoría de las tesinas, y desarrollan un programa de investigación propio. En segundo lugar, profesores asociados, contratados para impartir un solo curso, cursillo o seminario. Por último, profesores visitantes, que durante su estancia en el CEMFI dan conferencias o cursillos sobre temas relacionados con el Programa, en el caso de estancias cortas, o bien imparten asignaturas y desarrollan un proyecto de investigación, cuando se trata de visitas por períodos más largos.
Asker: Esto me confunde mucho, Cristina. Los datos, tal como los copié, aparecen en la parte superior izquierda de la libreta de notas del último año de secundaria.
The translation workplace 
peer agreement (net): +7
