Answer:
1. Her brother blamed her for breaking his phone.
2. I have no clue on how to answer this question.
3. Outside my window is a beautiful field of flowers.
4. He glued the piece of paper into his notebook.
5. Please leave your shoes at the door.
6. My parents are sleeping right now, please don't disturb them.
Explanation:
No they aren't proper to use in writing class they are considered slang. It would show your teacher that your not interested in sounding educated and proper.
Hope this helps!