Step one:

Meet with and English advisor and together fill out the program of study. (Make sure to bring a transcript of courses you've already taken to this meeting.)

Step two:

Take the agreed upon classes to fulfill the requirements.

Step three:

Pass the MTTC test in English.

Step four:

Contact Amy Eastman (aeastma1@emich.edu) and apply to have the endorsement added.  Further information and forms are available at http://www.emich.edu/coe/students/cont_cert/renewals/add_endorsement.html