If you meet the requirements, then you should apply for admittance to one of the following universities and its teacher education program:
Boise State University
http://admissions.boisestate.edu/
Idaho State University
http://www.isu.edu/enroll/admissions/
Lewis Clark State College
http://www.lcsc.edu/admissions/
University of Idaho
http://www.students.uidaho.edu/admissions/
Requirements vary; candidates should consult the institution for further information.