The U.S. flag in Miss McGee's office is clearly a 50-star flag with its nine rows of alternating six or five stars each, which came into use on July 4, 1960. The 48-star U.S. at the time (and since 1912) had 6 even rows of 8 stars.
The addresses listed on the student files accessed by Olivia in Season 1 episode 2 indicate the show is set in Delaware County, Pennsylvania. However Jane's mother directly contradicts this location in episode 3 by saying, "People in California don't know the first thing about Puerto Rico."