diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8c28bd2..2649240 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,10 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [1.3.12] 2016-03-17
+### Added
+- How to collaborate: send new links to the extras section
+
 ## [1.3.11] 2016-03-06
 ### Fixed
 - Nand to Tetris: change name and url
diff --git a/README.md b/README.md
index d277ae7..8f0dc5c 100644
--- a/README.md
+++ b/README.md
@@ -421,7 +421,7 @@ The **only things** that you need to know are how to use **Git** and **GitHub**.
 
 ## Change Log
 
-**Curriculum Version**: `1.3.11`
+**Curriculum Version**: `1.3.12`
 
 To show **respect** to all of our students, we will keep a [CHANGELOG](CHANGELOG.md) file that contains all the alterations that our curriculum may suffer.
 
@@ -435,9 +435,13 @@ We also include modern topics, making this course one of the **best options** fo
 
 You can [open an issue](https://help.github.com/articles/creating-an-issue/) and give us your suggestions as to how we can improve this guide, or what we can do to improve the learning experience.
 
-You can also [fork this project](https://help.github.com/articles/fork-a-repo/) to fix any mistakes that you have found or add new things, and then make a [pull request](https://help.github.com/articles/using-pull-requests/).
+You can also [fork this project](https://help.github.com/articles/fork-a-repo/) and send a [pull request](https://help.github.com/articles/using-pull-requests/) to fix any mistakes that you have found.
 
-Let's do it together! =)
+If you want to suggest a new resource, send a pull request adding such resource to the [extras](https://github.com/open-source-society/computer-science/tree/master/extras) section.
+
+The **extras** section is a place where all of us will be able to submit interesting additional articles, books, courses and specializations, keeping our curriculum *as immutable and concise as possible*.
+
+**Let's do it together! =)**
 
 ## Community
 
diff --git a/extras/articles.md b/extras/articles.md
index 1bb57ed..d3fa87c 100644
--- a/extras/articles.md
+++ b/extras/articles.md
@@ -32,7 +32,6 @@
 - [Big Data](#big-data)
 - [Data Mining](#data-mining)
 - [Internet of Things](#internet-of-things)
-- [Specializations](#specializations)
 
 ---
 
diff --git a/extras/books.md b/extras/books.md
index 47ef1f0..e86ee9e 100644
--- a/extras/books.md
+++ b/extras/books.md
@@ -32,7 +32,6 @@
 - [Big Data](#big-data)
 - [Data Mining](#data-mining)
 - [Internet of Things](#internet-of-things)
-- [Specializations](#specializations)
 
 ---
 
diff --git a/extras/courses.md b/extras/courses.md
index 0ad9a5a..a656a96 100644
--- a/extras/courses.md
+++ b/extras/courses.md
@@ -32,7 +32,6 @@
 - [Big Data](#big-data)
 - [Data Mining](#data-mining)
 - [Internet of Things](#internet-of-things)
-- [Specializations](#specializations)
 
 ---