The Boston consulate covers five New England states. Unlike most other US consulates, Boston also accepts permanent students at educational institutions within the jurisdiction — even if they don't live there permanently.
The Boston consulate is unusually explicit: incomplete or incorrect applications are automatically returned and you must request a new appointment. Given that appointments are limited and the processing time is 8 weeks, a returned application could delay your start date significantly.
Boston requires originals plus copies of everything. Every application must be in a labelled folder. Documents not in Spanish must be translated by a certified sworn translator.
Students at a US institution in the jurisdiction: notarised copy of your student ID plus enrolment letter.
Residents not currently studying: notarised utility bill or lease contract.
Living with parents: a birth certificate showing the relationship.