Karina,
As Kazachka says, it is possible. However, it is difficult, and requires the employer, not the applicant, to initiate a complicated and time intensive process to begin visa authorization. Districts have not historically been interested in doing so unless they have a real shortage of options in a particular certification area. It is difficult and expensive for them to undertake this process for a foreign national not currently in the state because by the time the paperwork is completed, it is frequently too late for the foreign teacher to obtain the required visa stamps and get to Alaska in time for the school year to start.
This does not mean it isn't possible, but above all it requires finding a willing district to "sponsor" you. Each year there are some teachers who successfully navigate the obstacles and secure jobs. It does require persistence and a fair bit of luck on timing.
The main ATP website has this as one of their top Frequently Asked Questions (FAQs) here:
http://www.alaskateacher.org/foreign_teachers.phpAnd here is the official Alaska Department of Education information about the credential
https://education.alaska.gov/teachercer ... n_Info.pdfHope this helps,
John