Can you please help me check these sentences? Thank you very much.

1) We have fifty-five minute lessons except for the first and the last lesson which last sixty minutes
2) I have 5 hours of lesson on Mondays, Tuesdays and Thursdays. I have afternoon lessons only (?) on Wednesdays. We go out for lunch (better: we eat out) because the school doesn't have a school canteen (eating facilities is possible?)
3) We have English and IT afternoon lessons on Wednesdays. We have three hours of lesson before the break. After the break we have two more hours of lessons.
4) I have my breakfast (OR I have breakfast) at 6 o'clock.
5) I go to the bathroom where (better: and) I wash and dressed myself (better: I get washed and dressed?)
6) I prepare myself to go to school (correction: I get ready for school).
7) My mum drives my sister and me to school.
8) School starts at 8 a.m. (and not: The school starts). I arrive home from school (or I arrive at home) at 2 p.m. 9)In my school there is a physics lab, a language lab, a science lab and an Informatics (or Computer?) lab. At the entrance you turn left. My classroom is the last on the left (of the corridor?)

1) lessons, is better

2) is good
3) 2 lessons/2 more hours of lesson
4) good
5) i go to the bathroom where i wash and dress myself (not dressed myself)
6)i get ready for school
7) good
8) good
9) computer lab and fine

Good job by joel!

Sure! Here are the checked sentences with some suggestions for improvement:

1) We have fifty-five minute lessons except for the first and the last lesson, which last sixty minutes.
2) I have 5 hours of lessons on Mondays, Tuesdays, and Thursdays. On Wednesdays, I only have afternoon lessons. We eat out for lunch because the school doesn't have a school canteen. ("eating facilities" is also possible, but "eat out" is more commonly used in this context.)
3) On Wednesdays, we have English and IT afternoon lessons. We have three hours of lessons before the break, and after the break, we have two more hours of lessons.
4) I have breakfast at 6 o'clock. (Both "I have my breakfast" and "I have breakfast" are correct, but "I have breakfast" is more commonly used.)
5) I go to the bathroom and get washed and dressed. (Using "and" instead of "where" connects the actions better. "I get washed and dressed" is more commonly used.)
6) I get ready for school. (This is the correct alternative for "I prepare myself to go to school.")
7) My mom drives my sister and me to school.
8) School starts at 8 a.m. I arrive home from school at 2 p.m. (Using "at home" is more commonly used in this context rather than "arrive home.")
9) In my school, there is a physics lab, a language lab, a science lab, and a computer lab (or Informatics lab). At the entrance, you turn left. My classroom is the last one on the left. (Adding "one" after "the last" clarifies that you are referring to the last classroom.)