the subject line is "my hobbies are video games, movies and music."
the second line is "my mom doesn't speak japanese, but she speaks english often." although I would say "de" instead of "(w)o"
last one, to say "I had tacos for dinner," I would say "bangohan toshite tacos wo tabemashita." As it stands, it sounds like his dinner ate the tacos. Still not bad for a 10th grader, how long has he been studying?