It generally depends on the teacher you're working with. But to be on the safe side, I'd incorporate your first and last name, the date the assignment was finished on, which assignment it was, and your teachers name. Anything else like lesson number and school name can be left out, but you might want to annalyse it before forgetting, or adding it in.
Answer: Every proper sentence in Spanish must have a subject and a verb. There is also a proper place for subjects and verbs in a sentence. Begin a sentence with the subject (the person, place, or thing you're talking about). Follow that with the verb, and then the rest of the sentence (where, how, etc).
Público heterogéneo. ...
Canales artificiales. ...
Mensajes unidireccionales. ...
Emisor colectivo. ...
Sin fronteras espaciales ni temporales.