does junior high have to be capitalized?

No. The only time junior high is capitalized is when it's used as part of the name of a particular school.

Example: They attend Central Junior High School.

lol thanx

dus this make sense in junior high Matt loved basketball.

Yes, the term "Junior High" should be capitalized. In English grammar, proper nouns usually require capitalization, and "Junior High" refers to a specific educational institution or level of schooling. However, it's worth noting that there can be slight variations in capitalization depending on the specific context or style guide being followed.