diff --git a/12.temporary_ins/05.coordinates-systems/40.spherical-coordinates/20.overview/cheatsheet.en.md b/12.temporary_ins/05.coordinates-systems/40.spherical-coordinates/20.overview/cheatsheet.en.md
index a96d07506..4b172b0a2 100644
--- a/12.temporary_ins/05.coordinates-systems/40.spherical-coordinates/20.overview/cheatsheet.en.md
+++ b/12.temporary_ins/05.coordinates-systems/40.spherical-coordinates/20.overview/cheatsheet.en.md
@@ -4,6 +4,8 @@ published: true
 routable: false
 visible: false
 lessons:
+    - slug: cartesian-cylindrical-spherical-coordinates
+      order: 2
     - slug: spherical-coordinates-linear
       order: 2
 ---