Here's a short story:

In less than two months, Junior 3 students around the country will take the senior high school entrance exam. They are studying hard for this big challenge. Do they have time to do something in memory of their middle school years? Many do. Leng Jingze, 15, from Tianjin said that in her class students are already writing goodbye messages for each other. "Even the head teacher has a plan," said Leng. "She plans to put all our class photos and the Chinese compositions we have written onto a CD and give each student one," said Leng. "She will also write something for each student." Wang Zeyu, 16, in Changchun, Jilin said his classmates are making "lucky stars" as graduation gifts. They are making the cheerful stars from colored paper. "Before making a lucky star, you write some words for the person on the paper," said Wang. "He or she can read the words later." Who does Wang want to make a lucky star for? He said he wanted to make one for his head teacher. "I'll write: Dear teacher, you always look so serious," said Wang. "But we know you have a warm heart. Smile more!" In Xiao Xia's school in Beijing, each Junior 3 student will get a yearbook , in which the graduating classes will put their photos and self-introductions. "Most classes have written an article as the self-introduction," said Xiao, 15. "We have written a poem in the ancient style!" The poem records the big events of the class's history and is in the shape of the number 9. "Nine is our class number," said Xiao, who felt very proud of the idea. "Our class may be not the one with the best school grade but it must be the most creative one," said Xiao. "I feel lucky to study in such a class!" (End of story)

Provide your best guess for the following question. Give ONLY the guess, no other words or explanation.

For example:

Guess: <most likely guess, as short as possible; not a complete sentence, just the guess!>

Here are a few examples of questions and answers:

Question: What exam is coming up?
Guess: senior high school entrance exam

Now answer the following question in the same format.

Question: What are they doing to create memories?

writing goodbye messages