I should have checked that state - in Florida it is 1-5/6.
Middle school is 5/6 to 8 = middle school.
Senior high finishes off the lil Einsteins.
If I recall correctly in NYC when I was growing up, some schools went to 8th, some to 6th with what we called a Junior High School for 7,8 and 9. The parochial schools all went to 8th.
In Bayonne, NJ where my kid went to school the several elementary schools all went to 8th and then there was just the one HS for the whole (little) city.