Christmas Eve with My Family

Hi Kyouko, 

I would like to provide some suggestions for your writing: 

(1) We can definitely say that someone is "at school" if he or she is present and physically inside the school. However, we say that someone is "in school" when he or she is enrolled as a student "in" that school and is studying. A student can be "in school" though he or she may not be physically in a school building. 

(2) If we say that you celebrated Christmas "to exchange presents", it may give the reader an impression that your purpose of celebrating Christmas was to exchange presents only. Another example: "I read this book to share the author's ideas with others." (There was no way you could share the author's ideas without reading the book first. So, you had to read the book in order to get the sharing done.) versus "I read this book and shared the author's ideas with others." (Here, the meaning is slightly different: You read this book and decided to share its contents with others.) I assumed that you wanted your family to celebrate Christmas and the exchange of presents was just part of that celebration, so I used "and" for you. 

(3) We use the preposition "with" to express an interaction or some accompaniment. Examples: I studied with him last night. (accompaniment) / I had an argument with her previously. (interaction) / I sympathise with the horrible plight of the refugees. (emotional reaction to something)