diff --git a/courses/mi-pyt/plan.yml b/courses/mi-pyt/plan.yml
index 21a7dd7b97..d8214e8283 100644
--- a/courses/mi-pyt/plan.yml
+++ b/courses/mi-pyt/plan.yml
@@ -1,14 +1,14 @@
 - name: Lekce
   materials:
-  - link: lessons/intro/requests-click
-  - link: lessons/intro/flask
-  - link: lessons/intro/moduly
-  - link: lessons/intro/testovani
-  - link: lessons/intro/dokumentace
-  - link: lessons/intro/pandas
-  - link: lessons/intro/numpy
-  - link: lessons/intro/cython    
-  - link: lessons/intro/pyqt
-  - link: lessons/intro/async
-  - link: lessons/intro/magie
-  - link: lessons/intro/micropython
+  - link: intro/requests-click
+  - link: intro/flask
+  - link: intro/moduly
+  - link: intro/testovani
+  - link: intro/dokumentace
+  - link: intro/pandas
+  - link: intro/numpy
+  - link: intro/cython    
+  - link: intro/pyqt
+  - link: intro/async
+  - link: intro/magie
+  - link: intro/micropython
diff --git a/courses/pyladies/plan.yml b/courses/pyladies/plan.yml
index 0b26863894..ab5e833e97 100644
--- a/courses/pyladies/plan.yml
+++ b/courses/pyladies/plan.yml
@@ -1,67 +1,67 @@
 - name: Instalace
   materials:
-  - link: lessons/beginners/cmdline
-  - link: lessons/beginners/install
-  - link: lessons/beginners/install_editor
-  - link: lessons/beginners/install_git
+  - link: beginners/cmdline
+  - link: beginners/install
+  - link: beginners/install_editor
+  - link: beginners/install_git
 
 - name: První program
   materials:
-  - link: lessons/beginners/hello-world
-  - link: lessons/beginners/printing
-  - link: lessons/beginners/variables
-  - link: lessons/beginners/comparisons
-  - link: lessons/beginners/and-or
+  - link: beginners/hello-world
+  - link: beginners/printing
+  - link: beginners/variables
+  - link: beginners/comparisons
+  - link: beginners/and-or
 
 - name: Cykly
   materials:
-  - link: lessons/beginners/functions
-  - link: lessons/intro/turtle
-  - link: lessons/beginners/while
+  - link: beginners/functions
+  - link: intro/turtle
+  - link: beginners/while
 
 - name: Správa zdrojového kódu
   materials:
-  - link: lessons/beginners/git
-  - link: lessons/beginners/branching
+  - link: beginners/git
+  - link: beginners/branching
 
 - name: Funkce & Řetězce
   materials:
-  - link: lessons/beginners/own_functions
-  - link: lessons/beginners/strings
+  - link: beginners/own_functions
+  - link: beginners/strings
     
 - name: Testování
   materials:
-  - link: lessons/beginners/exceptions
-  - link: lessons/beginners/modules
-  - link: lessons/beginners/testing
-  - link: lessons/beginners/circular_imports
+  - link: beginners/exceptions
+  - link: beginners/modules
+  - link: beginners/testing
+  - link: beginners/circular_imports
 
 - name: Spolupráce a Open-Source
   materials:
-  - link: lessons/beginners/cooperation_and_OSS
-  - link: lessons/beginners/files
+  - link: beginners/cooperation_and_OSS
+  - link: beginners/files
 
 - name: Seznamy
   materials:
-  - link: lessons/beginners/lists
-  - link: lessons/beginners/tuples
+  - link: beginners/lists
+  - link: beginners/tuples
 
 - name: Grafika
   materials:
-  - link: lessons/intro/pyglet
-  - link: lessons/projects/pong
+  - link: intro/pyglet
+  - link: projects/pong
 
 - name: Slovníky
   materials:
-  - link: lessons/beginners/dicts
-  - link: lessons/intro/json
-  - link: lessons/beginners/github-api
+  - link: beginners/dicts
+  - link: intro/json
+  - link: beginners/github-api
 
 - name: Třídy
   materials:
-  - link: lessons/beginners/classes
-  - link: lessons/beginners/inheritance
+  - link: beginners/classes
+  - link: beginners/inheritance
 
 - name: Závěrečný projekt
   materials:
-  - link: lessons/projects/asteroids
+  - link: projects/asteroids
diff --git a/lessons/beginners/and-or/index.html b/lessons/beginners/and-or/index.html
index 024628b4ba..1129d98593 100644
--- a/lessons/beginners/and-or/index.html
+++ b/lessons/beginners/and-or/index.html
@@ -1,6 +1,6 @@
-{% extends 'templates/_base.html' %}
+{% extends 'templates/_html_page.html' %}
 
-{% block content %}
+{% block lesson %}
             <div class="row stuff">
                 <div class="col-lg-12">
                     <h1><em>Nebo</em> anebo <em>a</em></h1>
diff --git a/lessons/beginners/cmdline/index.html b/lessons/beginners/cmdline/index.html
index f0a99250e9..512187ab21 100644
--- a/lessons/beginners/cmdline/index.html
+++ b/lessons/beginners/cmdline/index.html
@@ -1,6 +1,6 @@
-{% extends 'templates/_base.html' %}
+{% extends 'templates/_html_page.html' %}
 
-{% block content %}
+{% block lesson %}
             <div class="slides">
                 <section class="row stuff">
                     <div class="col-lg-12">
diff --git a/lessons/beginners/git/index.html b/lessons/beginners/git/index.html
index d990827fbe..b36d5af17e 100644
--- a/lessons/beginners/git/index.html
+++ b/lessons/beginners/git/index.html
@@ -1,4 +1,4 @@
-{% extends 'templates/_base.html' %}
+{% extends 'templates/_html_page.html' %}
 
 {% block style %}
 .green  {   color:  #0A3;    }
diff --git a/lessons/beginners/install/index.html b/lessons/beginners/install/index.html
index 0ecfa0ce70..d282cd53e3 100644
--- a/lessons/beginners/install/index.html
+++ b/lessons/beginners/install/index.html
@@ -1,6 +1,6 @@
-{% extends 'templates/_base.html' %}
+{% extends 'templates/_html_page.html' %}
 
-{% block content %}
+{% block lesson %}
             <div class="row stuff">
                 <div class="col-lg-12">
                     <h1>Instalace</h1>
diff --git a/lessons/beginners/install_editor/index.html b/lessons/beginners/install_editor/index.html
index 5db36d3747..f7c98c55c5 100644
--- a/lessons/beginners/install_editor/index.html
+++ b/lessons/beginners/install_editor/index.html
@@ -1,6 +1,6 @@
-{% extends 'templates/_base.html' %}
+{% extends 'templates/_html_page.html' %}
 
-{% block content %}
+{% block lesson %}
             <div class="row stuff">
                 <div class="col-lg-12">
                     <h1>Nastavení editoru</h1>
diff --git a/lessons/beginners/install_git/index.html b/lessons/beginners/install_git/index.html
index 0e44813d65..8809028d6d 100644
--- a/lessons/beginners/install_git/index.html
+++ b/lessons/beginners/install_git/index.html
@@ -1,6 +1,6 @@
-{% extends 'templates/_base.html' %}
+{% extends 'templates/_html_page.html' %}
 
-{% block content %}
+{% block lesson %}
 
             <div class="row stuff">
                 <section class="col-lg-12">
diff --git a/naucse/routes.py b/naucse/routes.py
index 06f07b03c9..0381d96540 100644
--- a/naucse/routes.py
+++ b/naucse/routes.py
@@ -59,10 +59,10 @@ def title_loader(plan):
 
     for lesson in plan:
         for mat in lesson['materials']:
-            lesson_link = mat['link']
-            if lesson_link.split('/')[0] == "lessons":
+            lesson_link = "/".join(mat['link'].split("/")[-2:])
+            if lesson_link[-3:] != "pdf":
                 lesson_type = lesson_link.split("/")[1]
-                info_file = read_yaml(lesson_link + "/info.yml")
+                info_file = read_yaml("lessons/" + lesson_link + "/info.yml")
                 lesson_dict[mat['link']] = (lesson_type, info_file['title'])
     return lesson_dict
 
@@ -84,18 +84,88 @@ def course_page(course):
 
 @app.route('/runs/<year>/<run>/')
 def run_page(year, run):
-    """Run's page."""
+    """Run page."""
     template = "runs/{}/{}/index.html".format(year, run)
     plan = read_yaml("runs/{}/{}/plan.yml".format(year, run))
     title = (read_yaml("runs/runs.yml"))[int(year)][run]['title']
 
     lesson_dict = title_loader(plan)
 
+    def lesson_url(lesson_type, lesson):
+        """Link to the specific lesson."""
+        return url_for('run_lesson', year=year, run=run, lesson_type=lesson_type, lesson=lesson)
+
     try:
-        return render_template(template, plan=plan, names=lesson_dict, title=title)
+        return render_template(template, plan=plan, names=lesson_dict, title=title, lesson_url=lesson_url)
+    except TemplateNotFound:
+        abort(404)
+
+
+def prv_nxt_teller(year, run, lesson):
+    """Determine the previous and the next lesson."""
+    plan = read_yaml("runs/{}/{}/plan.yml".format(year, run))
+
+    tmp_prv = None
+    nxt = None
+    next_one = False
+
+    for l in plan:
+        for mat in l["materials"]:
+            if next_one:
+                nxt = "/".join(mat["link"].split("/")[-2:])
+                break
+
+            if mat["link"].split("/")[-1] == lesson:
+                prv = tmp_prv
+                next_one = True
+            else:
+                tmp_prv = "/".join(mat["link"].split("/")[-2:])
+
+    if prv != None and prv[-3:] == "pdf":
+        prv = None
+    if nxt != None and nxt[-3:] == "pdf":
+        nxt = None
+
+    return (prv, nxt)
+
+
+@app.route('/runs/<year>/<run>/<lesson_type>/<lesson>/', defaults={'page': 'index'})
+@app.route('/runs/<year>/<run>/<lesson_type>/<lesson>/<page>/')
+def run_lesson(year, run, lesson_type, lesson, page):
+    """Run's lesson page."""
+    info = read_yaml("lessons/{}/{}/info.yml".format(lesson_type, lesson))
+
+    template = 'lessons/{}/{}/{}.{}'.format(lesson_type, lesson, page, info['style'])
+
+
+    def lesson_static_url(path):
+        """Static in the specific lesson."""
+        return url_for('lesson_static', lesson_type=lesson_type, lesson=lesson, path=path)
+
+
+    def lesson_url(lesson):
+        """Link to the specific lesson."""
+        return url_for('run_lesson', year=year, run=run, lesson_type=lesson.split('/')[0], lesson=lesson.split('/')[1], page=page)
+
+
+    prv, nxt = prv_nxt_teller(year, run, lesson)
+
+    file = open(template, 'r')
+    content = file.read()
+    title = info['course'] + ': ' + info['title']
+
+    try:
+        if info['style'] == "md":
+            return render_template('templates/_markdown_page.html', static=lesson_static_url, lesson=lesson_url, title=title, content=content)
+        elif info['style'] == "ipynb":
+            return render_template('templates/_ipython_page.html', static=lesson_static_url, lesson=lesson_url, title=title, content=content)
+        else:
+            return render_template(template, static=lesson_static_url, lesson=lesson_url, title=title, nxt=nxt, prv=prv)
     except TemplateNotFound:
         abort(404)
 
+    file.close()
+
 
 @app.route('/lessons/<lesson_type>/<lesson>/', defaults={'page': 'index'})
 @app.route('/lessons/<lesson_type>/<lesson>/<page>/')
diff --git a/naucse/templates/_html_page.html b/naucse/templates/_html_page.html
new file mode 100644
index 0000000000..536b90dcb1
--- /dev/null
+++ b/naucse/templates/_html_page.html
@@ -0,0 +1,20 @@
+{% extends "templates/_base.html" %}
+
+{% block content %}
+
+{% block lesson %}
+{% endblock lesson %}
+
+{% if prv is defined and prv != None %}
+    <span>
+        <a href="{{ lesson(prv) }}">← {{prv}}</a>
+    </span>
+{% endif %}
+
+{% if nxt is defined and nxt != None %}
+    <span class="align-right">
+        <a href="{{ lesson(nxt) }}">{{nxt}} →</a>
+    </span>
+{% endif %}
+
+{% endblock content %}
diff --git a/naucse/templates/_lessons_list.html b/naucse/templates/_lessons_list.html
index 1efc9dc271..3a1a0f95c2 100644
--- a/naucse/templates/_lessons_list.html
+++ b/naucse/templates/_lessons_list.html
@@ -1,4 +1,4 @@
-{% extends 'templates/_base.html' %}
+{% extends "templates/_base.html" %}
 
 {% block content %}
 
@@ -11,19 +11,19 @@
                 {% for lesson in plan %}
                 <div id="section{{ loop.index }}">
                     <h4>
-                        {% if 'date' in lesson %}
-                            Lekce {{ loop.index }} - {{ lesson['name'] }} ({{ lesson['date'] }})
+                        {% if "date" in lesson %}
+                            Lekce {{ loop.index }} - {{ lesson["name"] }} ({{ lesson["date"] }})
                         {% else %}
-                            Lekce {{ loop.index }} - {{ lesson['name'] }} 
+                            Lekce {{ loop.index }} - {{ lesson["name"] }} 
                         {% endif %}
                      </h4>
-                    {% for mat in lesson['materials'] %}
+                    {% for mat in lesson["materials"] %}
                         <div>
                             <span class="glyphicon-pencil"></span>
-                        {% if mat['link'].split('/')[0] == "lessons" %}
-                            <a href="{{ lesson_url(mat['link'].split('/')[1], mat['link'].split('/')[2]) }}">{{ names.get(mat['link'])[1] }}</a>
+                        {% if mat["link"][:4] == "http" %}
+                            <a href={{ mat["link"] }}>{{ mat["name"] }}</a> 
                         {% else %}
-                            <a href={{ mat['link'] }}>{{ mat['name'] }}</a> 
+                            <a href="{{ lesson_url(mat["link"].split("/")[-2], mat["link"].split("/")[-1]) }}">{{ names.get(mat["link"])[1] }}</a>
                         {% endif %}
                         </div>
                     {% endfor %}
diff --git a/runs/2017/pyladies-brno-jaro-po/plan.yml b/runs/2017/pyladies-brno-jaro-po/plan.yml
index 739b7c0046..eafa3e20a0 100644
--- a/runs/2017/pyladies-brno-jaro-po/plan.yml
+++ b/runs/2017/pyladies-brno-jaro-po/plan.yml
@@ -1,10 +1,10 @@
 - name: Instalace
   date: "27. 2. 2017"
   materials:
-  - link: lessons/beginners/cmdline
-  - link: lessons/beginners/install
-  - link: lessons/beginners/install_editor
-  - link: lessons/beginners/install_git
+  - link: runs/2017/pyladies-brno-jaro-po/beginners/cmdline
+  - link: runs/2017/pyladies-brno-jaro-po/beginners/install
+  - link: runs/2017/pyladies-brno-jaro-po/beginners/install_editor
+  - link: runs/2017/pyladies-brno-jaro-po/beginners/install_git
   - link: https://github.com/pyvec/cheatsheets/raw/master/keyboard/keyboard-cs.pdf
     name: Tahák na klávesnici (PDF)
   - link: https://github.com/PyLadiesCZ/pyladies.cz/raw/master/original/v1/s001-install/handout/handout.pdf
diff --git a/runs/index.html b/runs/index.html
index 92ec47e1f1..5913c884cd 100644
--- a/runs/index.html
+++ b/runs/index.html
@@ -13,7 +13,6 @@ <h4><a href="{{ run_url(year, run) }}">{{ runs[year][run]['title'] }}</a></h4>
                         <p> {{ runs[year][run]['description'] }} </p>
                     </div>
                     {% endfor %}
-
                 {% endfor %}
             </div>
         </div>
diff --git a/static/css/nausce.css b/static/css/nausce.css
index 4ff021feaa..ca367e8e76 100644
--- a/static/css/nausce.css
+++ b/static/css/nausce.css
@@ -204,3 +204,12 @@ details.detail-not-expanded {
         width: 100%;
     }
 }
+
+span.align-right {
+  float: right;
+}
+
+span.align-center {
+  text-align: center;
+}
+