Some more of my expository essay

Is it sounding "expository" enough?

You won’t find a more judgmental or more discriminating group than that of teenagers. We hate certain foods, like all manner of strange clothing, can’t rip ourselves away from inane videos on YouTube, and yet can’t watch a ten-minute video in class for more than five seconds. And, it’s hard to find a more widely scorned activity among this unpredictable group than writing for fun. We’re forced to write all day in school, so who in their right mind would do it willingly?
Of course, writing itself is not actually a bad thing, even if having to do it for school makes it seem so. And, as it turns out, one form of free-writing can be healthy – keeping a journal.
The word “journal” comes from the French word “le jour,” meaning day. The basic idea of one is to write down the daily events of life and reflect on them. The oldest known journals are from the Middle East and Asia, and there are some that have even become famous, such as The Diary of Anne Frank, written during the Holocaust by Anne Frank while in hiding from the Nazis.
Although keeping a journal may seem like a daily hassle instead of daily relief, the latter is much more true than the former. According to James Pennebaker, professor of psychology at the University of Texas, a study has shown that writing down your experiences, especially about emotional upheavals in your life, can be beneficial. For example, documenting these experiences can “enhance immune function, reduce anxiety and depression, improve sleep, and lift performance at school or work” (Words). The study, conducted by the professor himself, had students writing for just 15-20 minutes a day about a traumatic event from their pasts. The students who wrote in their journals about both the facts of the event and the emotions surrounding it experienced the health benefits listed before.
Deb Western, a social worker and lecturer at La Trobe University, has described the effects of writing down your life as relieving, and clarifying. She speaks from personal experience, as she conducted a study among women with depression who kept journals for a set amount of time. So, not only is keeping a journal physically healthy, but it’s psychologically beneficial as well.