Update app.py

app.py

@@ -70,7 +70,7 @@ def create_interface() -> gr.Blocks:
                     info="Choose the subject of your lesson"
                 )
                 difficulty = gr.Radio(
-                    ["Beginner", "Intermediate", "Advanced"],
+                    ["Elementary", "High School", "College"],
                     label="Difficulty Level",
                     info="Select your proficiency level"
                 )