diff --git a/01.curriculum/01.physics-chemistry-biology/02.Niv2/04.optics/04.use-of-basic-optical-elements/02.mirror/06.course-level-down/page.en.md b/01.curriculum/01.physics-chemistry-biology/02.Niv2/04.optics/04.use-of-basic-optical-elements/02.mirror/06.course-level-down/page.en.md
index 70107fd31..bf23bba6c 100644
--- a/01.curriculum/01.physics-chemistry-biology/02.Niv2/04.optics/04.use-of-basic-optical-elements/02.mirror/06.course-level-down/page.en.md
+++ b/01.curriculum/01.physics-chemistry-biology/02.Niv2/04.optics/04.use-of-basic-optical-elements/02.mirror/06.course-level-down/page.en.md
@@ -1,5 +1,7 @@
 ---
 title: 'course : level-1'
+published: false
+visible: false
 ---
 
 course : level-1