diff --git a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/20.n2/textbook.es.md b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/20.n2/textbook.es.md
index cf9d431f2..d40af0afb 100644
--- a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/20.n2/textbook.es.md
+++ b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/20.n2/textbook.es.md
@@ -3,12 +3,15 @@ title: Lluvia de ideas sobre las herramientas matemáticas necesarias en cada ni
 published: true
 routable: true
 visible: false
+---
+
+<!----------------------------------------------
 lessons:
     - slug: brainstorming-g12-mathematical-tools
       order: 3
     - slug: brainstorming-234-mathematical-tools
       order: 1
----
+----------------------------------------------->
 
 #### Lluvia de ideas sobre las herramientas matemáticas necesarias en el nivel 2