High-school

Many American high-school students do not know that the Civil War took place between 1861 and 1865.

The high-school sweethearts say it is true love.

"Why are you grinning like that?" "That female high-school student I just passed by was really cute."

College graduates earn on average over fifty per cent more than those with only a high-school degree.

I'm a high school graduate, so I guess that means I can answer high-school level questions and stuff.

Sami is a high-school dropout without a real job.

I need to brush up on my high-school algebra.

He is very high-school minded.

My high-school brown-haired friend Kevin boastfully adored everything about his English heritage, from the Rolls Royce to the Royal Family. He sometimes wore a black top hat for fun. One day, my gang with Kevin discussed the intrusion of Latin into the English language. He gleefully cited the word "fix" as a true Anglo-Saxon word, which I negated, indicating that it really derived from the Latin "fīgere." He knew that as a Filipino, I had also Roman ancestors. Kevin was like redheaded Michael in Grade 5, my first elementary grade on Lulu Island. He too was keen on Anglophilia.

You still have a high-school student mentality.