hi Billie

You always write a proper noun with a capital letter, since the noun represents the name of a specific person, place, or thing. The names of days of the week, months, historical documents, institutions, organisations, religions, their holy texts and their adherents are proper nouns.

so that would be Michael (persons name), Teaching TEFL (institution/organisation),and May (month of the year).

If I mind rightly MSN is also considered a proper noun.

Hope this is a help

Allan J.