diff --git a/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/07.optical-instruments-design/01.optical-instruments-characterization/03.new-course-beyond/annex.en.md b/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/07.optical-instruments-design/01.optical-instruments-characterization/03.new-course-beyond/annex.en.md
index 6ed0fb68e..808147926 100644
--- a/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/07.optical-instruments-design/01.optical-instruments-characterization/03.new-course-beyond/annex.en.md
+++ b/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/07.optical-instruments-design/01.optical-instruments-characterization/03.new-course-beyond/annex.en.md
@@ -1,5 +1,7 @@
 ---
 title: 'new course : beyond'
+published: false
+visible: false
 ---
 
 ! *YOUR  CHALLENGE*  :  look at the picture, and think of the right answers to the following questions