diff --git a/README.md b/README.md
index 60ac907..53371fd 100644
--- a/README.md
+++ b/README.md
@@ -137,16 +137,25 @@ Make sure that you're capable of using the following development tools:
 
 - We'll announce **all** assignments before the semester begins.
 - Submit your solution to <https://gg.kaist.ac.kr/course/17>.
+- **How to submit your assignment:**
+  - To submit your solution, you should run `submit.sh` in `scripts` directory. In other words, you should run the following command:
+  ```bash
+  # Run this command at the root directory of this repository.
+  $ ./scripts/submit.sh <assignment_number>
+
+  # E.g. To submit `assignment09`, run the following command:
+  $ ./scripts/submit.sh 9
+  ```
+  - After running the command above, in the `target` directory, you can find a `assignment<NUMBER>.zip` file (`assignment09.zip` for example). Submit this file to <https://gg.kaist.ac.kr/course/17>.
 - Read the documentation at <https://cp.kaist.ac.kr/cs220/cs220/>.
 - You can check your grade of each assignment by running the grading script.
   - You can run the grading script with the following command:
   ```bash
   $ ./scripts/grade.sh <assignment_number>
+  
+  # E.g. To grade `assignment09`, run the following command:
+  $ ./scripts/grade.sh 9
   ```
-    - E.g. To grade `assignment09`, run the following command:
-      ```bash
-      $ ./scripts/grade.sh 9
-      ```
 - You're **allowed** to use ChatGPT or other LLMs. Instead, you'll solve more problems than previous semesters.
 
 
diff --git a/scripts/prepare-submissions.sh b/scripts/prepare-submissions.sh
deleted file mode 100755
index 35ee7ac..0000000
--- a/scripts/prepare-submissions.sh
+++ /dev/null
@@ -1,10 +0,0 @@
-#!/usr/bin/env bash
-
-set -e
-
-BASEDIR=$(dirname "$0")/..
-
-mkdir -p $BASEDIR/target
-
-zip -rj $BASEDIR/target/assignment04.zip src/assignments/assignment04
-zip -rj $BASEDIR/target/assignment11.zip src/assignments/assignment11
diff --git a/scripts/submit.sh b/scripts/submit.sh
new file mode 100755
index 0000000..4dc272c
--- /dev/null
+++ b/scripts/submit.sh
@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+
+set -e
+
+if [ $# != 1 ]
+  then
+    echo "==============================="
+    echo "Invalid argument."
+    echo "Usage: './submit.sh <assignment_number>'"
+    echo "Example: './submit.sh 1' to grade assignment01"
+    exit 1
+fi
+
+BASEDIR=$(dirname "$0")/..
+mkdir -p $BASEDIR/target
+
+ZIP_FILE=$(printf "$BASEDIR/target/assignment%02d.zip" $1)
+SRC_PATH=$(printf "$BASEDIR/src/assignments/assignment%02d" $1)
+
+echo $ZIP_FILE
+echo $SRC_PATH
+zip -rj $ZIP_FILE $SRC_PATH