diff --git a/checking/level3/sub-title.md b/checking/level3/sub-title.md
index a69e150..e46ebfa 100644
--- a/checking/level3/sub-title.md
+++ b/checking/level3/sub-title.md
@@ -1,2 +1,2 @@
-How do we do a level 3 check?
+How do we do a level three check?