Massachusetts Common Core Standards
MA.CC.L.2. Language Standards Pre-K-5
Conventions of Standard English
L.2.1. Demonstrate command of the conventions of standard English grammar and usage when writing or speaking.
MA.L.2.1.g. Read, pronounce, write, and understand the meaning of common abbreviations for titles, locations, and time periods (e.g., Dr., Ms., Mrs., St., Rd., Ave., MA, U.S., months, days of the week, a.m., p.m.)