http://www.google.co.uk/search?sourceid=navclient&hl=en-GB&i...

This is one possibility.

detaşa - to detach, separate, transfer someone

ref., given the great importance accorded to this language in terms of loan words, etc., also similar to - < French - détacher - (envoyer) personne - to send, dispatch ..., Harper Collins robert French<>English Dictionary


Substitute teachers are dispatched by the central administration according to their availability, qualifications and school needs

--------------------------------------------------
Note added at 15 mins (2008-10-15 08:30:06 GMT)
--------------------------------------------------

Substitute teachers can also be long-term or short-term, their assignments can range from a half-day assignment to months-long assignments, even a semester or the better part of an entire school year

--------------------------------------------------
Note added at 37 mins (2008-10-15 08:51:24 GMT)
--------------------------------------------------

http://boston.k12.ma.us/jobs/subbing.asp

Successful candidates will be recommended for the substitute pool and their contact information will be entered into the Substitute Employee Management System (SEMS). Please remember that substitute teaching assignments are subject to availability and no one is guaranteed an assignment, even after the application selection process

Will this arrangement affect my chances of becoming a full-time teacher within this school district?


http://www.kellyeducationalstaffing.us/web/us/kes/en/pages/a...

No. Many Kelly Educational Staffing substitute teachers are hired into full-time teaching positions. Also, you can apply directly to the school district’s human resources department at any time

...

How will I be notified of and accept substitute teaching assignments?

Kelly uses an automated scheduling system. The Kelly Automated Scheduling System (KASS) is an easy-to-use system that can be accessed via the Internet or the telephone. Substitute teachers use KASS to accept jobs, manage their schedule, and record time worked for payroll purposes


i.e., potential assignments for substitute teachers are either temporary or long-term, and in some cases, cover an entire academic year


--------------------------------------------------
Note added at 45 mins (2008-10-15 08:59:25 GMT)
--------------------------------------------------

Any temporary teacher is by definition a substitute teacher replacing the teacher who has been normally assigned to that particular class/classroom and subject - they are basically classified together.

http://jobs.myspace.com/a/ms-jobs/list/q-Substitute & Tempor...

Substitute & Temporary Teacher jobs


--------------------------------------------------
Note added at 47 mins (2008-10-15 09:01:29 GMT)
--------------------------------------------------

You could say on temporary assignment to another school. But again, in replacement/subsitution of a regularly assigned teacher who for whatever reason is unable to fulfill the obligations of the contract for that assignment.

--------------------------------------------------
Note added at 50 mins (2008-10-15 09:04:20 GMT)
--------------------------------------------------

Subsititute teacher on temporary assignment would be another way to say much the same thing.

Secondment appears also in the definition I gave above < French. But at least in the U.S. at least this is incomprehensible, though valid in International English.

--------------------------------------------------
Note added at 2 hrs (2008-10-15 10:44:58 GMT)
--------------------------------------------------

Instructor could be a way around this - if it's a school (primary or secondary), then it is definitely teacher. If it is post-secondary, it would be instructor (neutral term) or professor (of various classes, - e.g., adjunct, associate, assistant, full, emeritus)

--------------------------------------------------
Note added at 4 days (2008-10-19 09:47:41 GMT)
--------------------------------------------------

Temporary per diem substitute teacher - or simply, per diem teacher on temporary assignment/teacher on temporary per diem assignment = a variation of the notes above.

Or - Temporary Appointee (Teacher), see below


http://www.counsel.nysed.gov/Decisions/volume31/d12691.htm

Appeal of PATRICIA NETTLES from action of the Board of Education of the City School District of the City of Oswego, relating to the employment of an uncertified teacher.

Decision No. 12,691

(April 30, 1992)

...Petitioner argues that because an appropriately certified teacher was available to teach, respondent abused its discretion in assigning an *uncertified **per diem substitute teacher** to the position on a temporary basis.* Respondent contends that a certified teacher is not necessarily qualified and that a board of education has discretion to apply its own criteria in determining who to employ as a teacher. Respondent further argues that it has discretion to fill a vacant position *on a temporary basis with a per diem substitute teacher* while continuing its efforts to recruit certified and qualified candidates for the position.


http://www.careerbuilder.com/JobSeeker/Jobs/JobDetails.aspx?...

see for info on subsitute teacher temporary assignments in Minnneapolis, in this case certified with a state teaching license


http://www.jefferson.k12.ky.us/Employee/SubstituteCert.html

What is a **temporary appointee assignment?**
**Temporary appointee assignments** are single assignments/positions at a particular school for twenty (20) days without interruption in an active service. Beginning on the **temporary appointee's** twenty-first day, he/she will be paid at the rate of a substitute teacher times 1.5 retroactive to the first day he/she began qualifying as a temporary appointee. **Temporary appointee** assignments* must be filled by substitute teachers who hold teaching certification.


----

Here are a number of options covering both certificated and non-certificated teachers on a temporary assignment to a school.

Also, I would revise the opinions above, "secondment" is appropriate for U.K. English but is incomprehensible in U.S. English so it is not a sufficiently neutral term to be valid for international English, which encompasses many other countries as well.












--------------------------------------------------
Note added at 4 days (2008-10-19 09:49:36 GMT)
--------------------------------------------------

Ditto for supply teachers.