EMILY: Tittle : Yayeon's birthday party
CORRECTION: TITLE: Yayeon's birthday party
EXPLANATION: Always check if the spelling is correct.

EMILY: I went to Yeyeon's house with my friends.
CORRECT!

EMILY: There were 6 members at the party.
CORRECTION: There were 6 PEOPLE/GUESTS at the party.
EXPLANATION: A "member" means a person who belongs to a group or an organization, so it's better to mention "people" or "guests" which means someone who comes to visit or is invited to a party.

EMILY: I gave her a lotion present.
CORRECTION: I gave her a lotion AS A present.
EXPLANTION: Indicate that your present was a lotion to make a complete sentence.

EMILY: She was so happy. We ate pizza, chicken, coke and cookies. It was so nice.
CORRECT!

EMILY: We played with her younger brother and her a puppy.
CORRECTION: We played with her younger brother and her puppy.
EXPLANATION: No need to put "a" to mention a pet.

EMILY: Her puppy was so cute.
CORRECT!

EMILY: We had very good time.
CORRECTION: We had A very good time.
EXPLANATION: Indicate the article "a" to complete the sentence.

Hello, Emily! Thank you for your homework. I'm very glad you had a good time and I can tell that you really enjoyed. I wish I could see Yeyeon's cute puppy! You did a great job and just take note of the corrections in order for you to do better. Keep it up, Emily! - Teacher Vicky