diff --git a/README.md b/README.md
index 917cea3..0a28e14 100644
--- a/README.md
+++ b/README.md
@@ -138,6 +138,18 @@ 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>.
 - Read the documentation at <https://cp.kaist.ac.kr/cs220/cs220/>.
+- We provide grading scripts for each assignment. Before submission, you can check your grade with your machine.
+  - Grading scripts are located at `scripts/` directory.
+  - You can run the grading script with the following command:
+  ```bash
+  $ `scripts/grade.sh <assignment number>`
+  ```
+    - For example,
+    - If you want to grade `assignment9`, run the following command:
+      ```bash
+      $ cd 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/grade.sh b/scripts/grade.sh
index eacee07..e0d8be5 100755
--- a/scripts/grade.sh
+++ b/scripts/grade.sh
@@ -16,6 +16,14 @@ run_linters || exit 1
 # Executes test for each runner.
 echo "Running with $RUNNER..."
 
+if [ $# != 1 ]
+  then
+    echo "==============================="
+    echo "Invalid number. $# arguments given."
+    echo "Usage: ./grade.sh <test_number>"
+    echo "Example: ./grade.sh 1"
+    exit 1
+fi
 TEST_NAME=$(printf "TEST%02d" $1)
 case $TEST_NAME in
     TEST01)
@@ -102,4 +110,5 @@ esac
 
 # Runs tests.
 SCORE=$(run_tests)
-echo Your score: $SCORE
+NUM_TESTS=${#TESTS[@]}
+echo Your score: ${SCORE}/${NUM_TESTS}