Teachers, administrators, specialists, and support staff needs to acquire licenses in order to work in public schools in Massachusetts.  Please follow the link below in order to learn more about the types of licenses, requirements, and various steps one must take in order to navigate this process.
http://www.doe.mass.edu/licensure/become-educator.html
This next link is a great tool to help you learn more about the requirements specific to your needs.  Here you enter your category, field, grade, type, and info about your situation in order to be directed to a personally curated page that details the steps and requirements you should be working towards.
https://gateway.edu.state.ma.us/elar/licensurehelp/LicenseRequirementsCriteriaPageControl.ser

The Massachusetts Tests for Educator License (MTEL) is designed to ensure that MA educators are proficient in the subject knowledge they will be teaching.  Please follow the link below in order to learn more about MTEL requirements for specific licensure as well as the process for registering for the tests.
http://www.doe.mass.edu/licensure/mtel.html
This next link provides more information about the content of the tests, as well as opportunities for alternative testing arrangements and study materials.
http://www.doe.mass.edu/mtel/

Please follow the link below in order to view a list of state-approved educator preparation programs.  These include higher education institutions, public school districts, collaboratives, and other methods in which you can find the program that is the best fit for you.
http://profiles.doe.mass.edu/search/search.aspx?leftNavId=11238
This next link is a great tool to help you find a program that best suits your interests and needs.  Here you are able to search via type of educator license you are pursuing, teaching level, type of program, and location, as well as by entering an address and finding programs that are within a close proximity.
https://gateway.edu.state.ma.us/elar/licensurehelp/ProgramSearchPageControl.ser