diff --git a/codes/activity-school b/codes/activity-school
new file mode 160000
index 0000000000000000000000000000000000000000..bd6d5bad67914025676cec7abba5ef5da497f249
--- /dev/null
+++ b/codes/activity-school
@@ -0,0 +1 @@
+Subproject commit bd6d5bad67914025676cec7abba5ef5da497f249