Do I have any grammar mistakes?

If I can teach in private school I would want the private school to be a huge and very well designed building, inside and out. I would make sure that my students I teach are very educated and understand what i teach them. The subject that I would like to teach will have to be English. I prefer English because it will be very easy to teach and my students will not have a hard time learning this subject. I would love for my students to leave my classroom with good manners and  will act appropriate. If i see that my students are working super hard on Fridays I will make it an entertainment day. The only way for them to earn their Fun Friday is if they do their work, be polite, and ask for help when needed. As a teacher i would like for other teachers to be comfortable when they are around me. If a teacher speaks to me I will make sure I am clearly listening and understanding what they are trying to say. If any of the other teachers have a problem i will try anything i can to help them out with their situation.

Explanation: You had a few grammar issues but i corrected them for you.

both the address and the poster use diction to convey their message. diction is defined as a style of writing or speaking based on the types of words chosen in order to send a message. parallelism is when a similar sentence structure is used for several sentences on a text; roosevelt's address doesn't follow that. repetition has to do with repeating a word or sentence in order to emphasize and idea, however neither the poster nor the address use repetion. finally, the address doesn't use images to convey a message.