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 about this on their official page: 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. Read the full list carefully — Boston has several requirements that differ from other US consulates.
Residents not currently studying: recent utility bill or lease contract — must be notarised and show your name and address.
Living with parents: a birth certificate showing the relationship (no translation needed, but must be apostilled).
Boston has more unique requirements than any other Spanish consulate in the US. Know all of these before preparing your documents.