3 activities:
What will you do this summer? song - I found this song on Youtube and typed up the lyrics (with Korean pronunciations). Half of the lyrics have the Korean translations and the students should (with help from the teacher), fill in the rest. The students like singing it.
Youtube:
https://www.youtube.com/watch?v=nx9IllEJP0gBingo Mill Activity - each student gets a worksheet. The top half lists the key expressions and the bottom half is a bingo board. They walk around class and find another person and play RPS. The winner asks, What will you do this summer? The loser picks ANY of the 6 key expressions and says it (I'll...) The winner listens to the answer and makes an X on their bingo board with that answer (can only make one X at a time). Students keep playing until they get a bingo (4 in a row). I haven't played this yet but most likely will just have students play for a set amount a time, and they'll get a point for every Bingo they've made (1 bingo = 1 point, 2 bingo's = 2 points, etc).
What will you do this summer worksheet - I found this years ago on this site. Students draw/color pictures and write what they will do this summer (on the Polaroids). Then share it in front of the class.