Answer:
- prace
 - spend
 - to
 - among
 - increase
 - so that
 
Step-by-step explanation:
The words listed above are the main problem points in what you have written. The sentences in grammatically correct form could be changed to the following: 
- School is my favourite place. 
 - The first reason is that I like spending time with my friends. 
 - I often talk with my friends in different classrooms. 
 - The second reason is that I like studying everything. 
 - I get more and more knowledgeable by the day. 
 - For these reasons, school is my favourite place to be. It's wonderful.