At the IASL conference in Italy 2009, the international school librarian group brainstormed criteria for describing an international school and although all international schools may not meet all criteria, a majority of criteria would be met. The criteria noted were as follows:
a. Transferability of the students education across international schools.
b. A moving population (higher than in state schools).
c. Multinational and multilingual student body. (percentages?)
d. An international curriculum.( eg. IB - DP, MYP, PYP)
e. International accreditation (e.g. CIS, IBO, North Eastern ASC, Weston Ass. of Schools and colleges were mentioned by the group).
f. A transient and multinational teacher population.
g. Non-selective student enrollment.
h. Usually English or bi-lingual as the language of instruction.
If you have any more criteria to add or just have something to say - please comment!