diff --git a/module2/ressources/jupyter.html b/module2/ressources/jupyter.html
index 71405a33ee8022c41efdbf9a41577563dbe9dd70..c2dc51c85db8f134e4adda8d8f6c87b282432319 100644
--- a/module2/ressources/jupyter.html
+++ b/module2/ressources/jupyter.html
@@ -3,7 +3,7 @@
 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
 <html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
 <head>
-<!-- 2018-07-19 jeu. 14:26 -->
+<!-- 2018-07-19 jeu. 15:45 -->
 <meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
 <meta name="viewport" content="width=device-width, initial-scale=1" />
 <title>Rstudio</title>
@@ -234,31 +234,31 @@ for the JavaScript code in this tag.
 <h2>Table of Contents</h2>
 <div id="text-table-of-contents">
 <ul>
-<li><a href="#org320e086">Interacting with gitlab</a></li>
-<li><a href="#org5fa8060">Additional Jupyter resources or tricks</a>
+<li><a href="#org97858c5">Interacting with gitlab</a></li>
+<li><a href="#orgb41aa11">Additional Jupyter resources or tricks</a>
 <ul>
-<li><a href="#org602d8a4">Tips and tricks</a></li>
-<li><a href="#orgf07bc97">Running R and Python in the same notebook</a></li>
-<li><a href="#org6fe9a0a">Exporting a notebook</a></li>
+<li><a href="#org2ca79c6">Tips and tricks</a></li>
+<li><a href="#orgf423e42">Running R and Python in the same notebook</a></li>
+<li><a href="#org7654980">Exporting a notebook</a></li>
 </ul>
 </li>
-<li><a href="#org27a7607">Installing jupyter or jupyter hub on your own machine</a>
+<li><a href="#org777e50c">Installing jupyter or jupyter hub on your own machine</a>
 <ul>
-<li><a href="#org3da1dd0">Installing jupyter</a></li>
-<li><a href="#orge6d06de">Using R</a></li>
-<li><a href="#org5d221f3">Exporting your notebooks with latex</a></li>
-<li><a href="#orgcd67c04">Interacting with gitlab</a></li>
-<li><a href="#orgd5ecec1">Interesting extensions</a></li>
-<li><a href="#org44b207c">Installing jupyterhub</a></li>
+<li><a href="#org3a2fabc">Installing jupyter</a></li>
+<li><a href="#orgcae22b4">Using R</a></li>
+<li><a href="#orgcd4e4e0">Exporting your notebooks with latex</a></li>
+<li><a href="#org9e7be3a">Interacting with gitlab</a></li>
+<li><a href="#org932058f">Interesting extensions to improve notebook readability</a></li>
+<li><a href="#orgcdd7391">Installing jupyterhub</a></li>
 </ul>
 </li>
 </ul>
 </div>
 </div>
 
-<div id="outline-container-org320e086" class="outline-2">
-<h2 id="org320e086">Interacting with gitlab</h2>
-<div class="outline-text-2" id="text-org320e086">
+<div id="outline-container-org97858c5" class="outline-2">
+<h2 id="org97858c5">Interacting with gitlab</h2>
+<div class="outline-text-2" id="text-org97858c5">
 <blockquote>
 <p>
 This section needs some love.
@@ -275,13 +275,13 @@ and to share your notebook with others.
 </p>
 </div>
 </div>
-<div id="outline-container-org5fa8060" class="outline-2">
-<h2 id="org5fa8060">Additional Jupyter resources or tricks</h2>
-<div class="outline-text-2" id="text-org5fa8060">
+<div id="outline-container-orgb41aa11" class="outline-2">
+<h2 id="orgb41aa11">Additional Jupyter resources or tricks</h2>
+<div class="outline-text-2" id="text-orgb41aa11">
 </div>
-<div id="outline-container-org602d8a4" class="outline-3">
-<h3 id="org602d8a4">Tips and tricks</h3>
-<div class="outline-text-3" id="text-org602d8a4">
+<div id="outline-container-org2ca79c6" class="outline-3">
+<h3 id="org2ca79c6">Tips and tricks</h3>
+<div class="outline-text-3" id="text-org2ca79c6">
 <p>
 The following <a href="https://www.dataquest.io/blog/jupyter-notebook-tips-tricks-shortcuts/">webpage</a> lists several Jupyter tricks (in particular, it
 illustrates many <code>Ipython magic</code> commands) that should improve your
@@ -291,9 +291,9 @@ now).
 </p>
 </div>
 </div>
-<div id="outline-container-orgf07bc97" class="outline-3">
-<h3 id="orgf07bc97">Running R and Python in the same notebook</h3>
-<div class="outline-text-3" id="text-orgf07bc97">
+<div id="outline-container-orgf423e42" class="outline-3">
+<h3 id="orgf423e42">Running R and Python in the same notebook</h3>
+<div class="outline-text-3" id="text-orgf423e42">
 <p>
 The best solution to this is to install rpy2. On my machine, I have
 installed the <code>python3-rpy2</code> debian package with <code>apt-get install</code>. An
@@ -335,9 +335,9 @@ plot((df)
 </ol>
 </div>
 </div>
-<div id="outline-container-org6fe9a0a" class="outline-3">
-<h3 id="org6fe9a0a">Exporting a notebook</h3>
-<div class="outline-text-3" id="text-org6fe9a0a">
+<div id="outline-container-org7654980" class="outline-3">
+<h3 id="org7654980">Exporting a notebook</h3>
+<div class="outline-text-3" id="text-org7654980">
 <p>
 Obviously, you can convert to html or pdf using the using the <code>File &gt;
 Download as &gt; HTML</code> (or <code>PDF</code>) menu option.  This can also be done from
@@ -364,13 +364,13 @@ taste.
 </div>
 </div>
 </div>
-<div id="outline-container-org27a7607" class="outline-2">
-<h2 id="org27a7607">Installing jupyter or jupyter hub on your own machine</h2>
-<div class="outline-text-2" id="text-org27a7607">
+<div id="outline-container-org777e50c" class="outline-2">
+<h2 id="org777e50c">Installing jupyter or jupyter hub on your own machine</h2>
+<div class="outline-text-2" id="text-org777e50c">
 </div>
-<div id="outline-container-org3da1dd0" class="outline-3">
-<h3 id="org3da1dd0">Installing jupyter</h3>
-<div class="outline-text-3" id="text-org3da1dd0">
+<div id="outline-container-org3a2fabc" class="outline-3">
+<h3 id="org3a2fabc">Installing jupyter</h3>
+<div class="outline-text-3" id="text-org3a2fabc">
 <p>
 Here is what you should install:
 </p>
@@ -401,16 +401,16 @@ The ipython notebook can then be run with the following command:
 </div>
 </div>
 </div>
-<div id="outline-container-orge6d06de" class="outline-3">
-<h3 id="orge6d06de">Using R</h3>
-<div class="outline-text-3" id="text-orge6d06de">
+<div id="outline-container-orgcae22b4" class="outline-3">
+<h3 id="orgcae22b4">Using R</h3>
+<div class="outline-text-3" id="text-orgcae22b4">
 <p>
 If you also want to have the R kernel in jupyter, follow <a href="https://github.com/IRkernel/IRkernel#installation">these
 instructions</a>.
 </p>
 
 <p>
-Alternatively, you can install <code>rpy2</code> (see the <a href="#orgf07bc97">Running R and Python in
+Alternatively, you can install <code>rpy2</code> (see the <a href="#orgf423e42">Running R and Python in
 the same notebook</a> section).
 </p>
 <div class="org-src-container">
@@ -419,9 +419,9 @@ the same notebook</a> section).
 </div>
 </div>
 </div>
-<div id="outline-container-org5d221f3" class="outline-3">
-<h3 id="org5d221f3">Exporting your notebooks with latex</h3>
-<div class="outline-text-3" id="text-org5d221f3">
+<div id="outline-container-orgcd4e4e0" class="outline-3">
+<h3 id="orgcd4e4e0">Exporting your notebooks with latex</h3>
+<div class="outline-text-3" id="text-orgcd4e4e0">
 <p>
 Here is what I had to install to make sure the notebook export via
 latex works:
@@ -433,9 +433,9 @@ sudo apt-get install texlive-xetex
 </div>
 </div>
 </div>
-<div id="outline-container-orgcd67c04" class="outline-3">
-<h3 id="orgcd67c04">Interacting with gitlab</h3>
-<div class="outline-text-3" id="text-orgcd67c04">
+<div id="outline-container-org9e7be3a" class="outline-3">
+<h3 id="org9e7be3a">Interacting with gitlab</h3>
+<div class="outline-text-3" id="text-org9e7be3a">
 <p>
 Here is our <a href="https://github.com/brospars/nb-git">jupyter extension that allows to git push/pull from the
 notebooks</a>:
@@ -447,9 +447,12 @@ jupyter nbextension enable nb-git
 </div>
 </div>
 </div>
-<div id="outline-container-orgd5ecec1" class="outline-3">
-<h3 id="orgd5ecec1">Interesting extensions</h3>
-<div class="outline-text-3" id="text-orgd5ecec1">
+<div id="outline-container-org932058f" class="outline-3">
+<h3 id="org932058f">Interesting extensions to improve notebook readability</h3>
+<div class="outline-text-3" id="text-org932058f">
+<p>
+Here are two interesting extensions that can improve readability:
+</p>
 <ul class="org-ul">
 <li><p>
 <a href="https://stackoverflow.com/questions/33159518/collapse-cell-in-jupyter-notebook">Code folding</a>
@@ -472,9 +475,9 @@ jupyter-serverextension enable --py hide_code
 </ul>
 </div>
 </div>
-<div id="outline-container-org44b207c" class="outline-3">
-<h3 id="org44b207c">Installing jupyterhub</h3>
-<div class="outline-text-3" id="text-org44b207c">
+<div id="outline-container-orgcdd7391" class="outline-3">
+<h3 id="orgcdd7391">Installing jupyterhub</h3>
+<div class="outline-text-3" id="text-orgcdd7391">
 <blockquote>
 <p>
 Benoit may give a few hints on this.
@@ -487,7 +490,7 @@ Benoit may give a few hints on this.
 <div id="postamble" class="status">
 <p class="date">Date: June, 2018</p>
 <p class="author">Author: Arnaud Legrand</p>
-<p class="date">Created: 2018-07-19 jeu. 14:26</p>
+<p class="date">Created: 2018-07-19 jeu. 15:45</p>
 <p class="validation"><a href="http://validator.w3.org/check?uri=referer">Validate</a></p>
 </div>
 </body>
diff --git a/module2/ressources/jupyter.org b/module2/ressources/jupyter.org
index 8c333e9e09cb661f21a9683d1725fb65baa338b8..c6e38343d6a335afc37eecf03bfdd08b42b36b0d 100644
--- a/module2/ressources/jupyter.org
+++ b/module2/ressources/jupyter.org
@@ -106,7 +106,8 @@ notebooks]]:
 jupyter nbextension install https://raw.githubusercontent.com/brospars/nb-git/master/nb-git.js
 jupyter nbextension enable nb-git
 #+end_src
-** Interesting extensions
+** Interesting extensions to improve notebook readability
+Here are two interesting extensions that can improve readability:
 - [[https://stackoverflow.com/questions/33159518/collapse-cell-in-jupyter-notebook][Code folding]]
   #+begin_src shell :results output :exports both
   pip3 install jupyter_contrib_nbextensions
