We'd have to see the original document, to see if the identifier as an "8th grade test" or "junior high school test" was added (in a different ink and/or different hand and/or typed onto the head of the document). This happens all the time, especially in small public libraries with bossy librarians, and when I was doing research on original documents I saw all sorts of "helpful" glosses and explanations added after the fact by well meaning people.
For the reasons stated above, the content of this document looks like a normal school test to me.