The classroom which Seeker was transferred too contained all the foreigners who due to their unique status, was approved by the WGP to remain in Phil-Pangea. Ever since the attack on China, several changes which called forth for the return of foreigners to their home country were allowed. The only groups that were allowed to remain, were students.
Due to the difference in Technological possibilities, most school credits are not accepted on other countries. As such, foreigners who study on different countries usually meant their long-term stay over at their country. In fact, in most cases, they live in the country they study as the trade they learn there may not be available in their own country or due to the difference in technological possibilities, the trade may not be similar in work, operations, and other details.