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diff --git a/demos/4-titlepage/main.tex b/demos/4-titlepage/main.tex
new file mode 100644
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+++ b/demos/4-titlepage/main.tex
@@ -0,0 +1,73 @@
+\documentclass[draft,twocolumn, fleqn]{article}
+\setlength\parskip{0.3cm}
+\usepackage{graphicx}
+\newcommand{\myCommand}[2]{
+This command supports two arguments #1 and #2.
+}
+
+
+\begin{document}
+\begin{titlepage}
+
+\newcommand{\HRule}{\rule{\linewidth}{0.5mm}} % Defines a new command for the horizontal lines, change thickness here
+
+\center % Center everything on the page
+ 
+%----------------------------------------------------------------------------------------
+%	HEADING SECTIONS
+%----------------------------------------------------------------------------------------
+
+\textsc{\LARGE Instituto Tecnológico de Morelia}\\[1.5cm] % Name of your university/college
+\textsc{\Large División de Estudios de Posgrado}\\[0.5cm] % Major heading such as course name
+\textsc{\large Ingeniería Y}\\[0.5cm] % Minor heading such as course title
+
+%----------------------------------------------------------------------------------------
+%	TITLE SECTION
+%----------------------------------------------------------------------------------------
+
+\HRule \\[0.4cm]
+{ \huge \bfseries Reporte de Práctica X}\\[0.4cm] % Title of your document
+\HRule \\[1.5cm]
+ 
+%----------------------------------------------------------------------------------------
+%	AUTHOR SECTION
+%----------------------------------------------------------------------------------------
+
+\emph{Alumno:}\\
+Gerardo Marx \textsc{Chávez-Campos} % Your name
+
+\emph{Profesor:} \\
+Dr. James \textsc{Brown} % Supervisor's Name
+\\[2cm]
+
+%	Fecha
+{\large \today}\\[2cm] % Date, change the \today to a set date if you want to be precise
+
+
+%	LOGO SECTION
+
+
+\includegraphics[width=6cm]{logo}\\[1cm] % Include a department/university logo - this will require the graphicx package
+ 
+%----------------------------------------------------------------------------------------
+
+\vfill % Fill the rest of the page with whitespace
+
+\end{titlepage}
+
+\myCommand{one}{two}
+
+
+
+\section{Intro}
+
+Some text demo demo demo. Some text demo here.Some text demo demo demo. Some text demo here.Some text demo demo demo. Some text demo here.Some text demo demo demo. Some text demo here.Some text demo demo demo. Some text demo here.Some text demo demo demo. Some text demo here.Some text demo demo demo. Some text demo here.Some text demo demo demo. Some text demo here.
+
+Some text demo demo demo. Some text demo here.Some text demo demo demo. Some text demo here.Some text demo demo demo. Some text demo here.Some text demo demo demo. Some text demo here.Some text demo demo demo. Some text demo here.Some text demo demo demo. Some text demo here.Some text demo demo demo. Some text demo here.Some text demo demo demo. Some text demo here.
+
+
+\end{document}
+%%% Local Variables:
+%%% mode: latex
+%%% TeX-master: t
+%%% End:
diff --git a/demos/5-article/main.tex b/demos/5-article/main.tex
new file mode 100644
index 0000000..bd3f459
--- /dev/null
+++ b/demos/5-article/main.tex
@@ -0,0 +1,67 @@
+\documentclass[draft,titlepage]{article}
+\usepackage{lipsum}
+
+
+
+\def\frontmatter{%
+    \pagenumbering{roman}
+    \setcounter{page}{1}
+    \renewcommand{\thesection}{\Roman{section}}
+  }%
+
+  \def\mainmatter{%
+    \newpage
+    \pagenumbering{arabic}
+    \setcounter{page}{1}
+    \setcounter{section}{0}
+    \renewcommand{\thesection}{\arabic{section}}
+  }%
+  
+
+\def\backmatter{%
+    \setcounter{section}{0}
+    \renewcommand{\thesection}{\Alph{section}}
+  }%
+  
+
+\title{The title}
+\author{Gerardo Marx Chávez Campos}
+
+\begin{document}
+\maketitle
+
+\frontmatter
+
+\section{Why Do This?}
+
+\lipsum[1]
+
+\section{Because I Can!}
+
+\lipsum[2]
+
+\newpage
+\tableofcontents
+
+\mainmatter
+
+\section{See?  It works!}
+
+\lipsum[3]
+
+\section{It's the best this way!}
+
+\lipsum[4]
+
+\backmatter
+
+\section{And We Even Get Appendices!}
+
+\lipsum[1]
+
+\end{document}
+
+%%% Local Variables:
+%%% mode: latex
+%%% TeX-master: t
+%%% End:
diff --git a/demos/6-pgfplots/data.csv b/demos/6-pgfplots/data.csv
new file mode 100644
index 0000000..44feac1
--- /dev/null
+++ b/demos/6-pgfplots/data.csv
@@ -0,0 +1,7 @@
+time, voltaje, corriente
+0,1,0.1
+1,2,0.2
+2,4,0.4
+3,6,0.6
+4,8,1.2
+6,10,1.9
diff --git a/demos/6-pgfplots/main.tex b/demos/6-pgfplots/main.tex
new file mode 100644
index 0000000..32b389a
--- /dev/null
+++ b/demos/6-pgfplots/main.tex
@@ -0,0 +1,45 @@
+\documentclass{article}
+\usepackage{tikz}
+
+\usepackage{pgfplots}
+\pgfplotsset{compat=1.5.1}
+
+\begin{document}
+
+%1: latex as calculator
+\begin{tikzpicture}
+\begin{axis}
+[xlabel=$x$,
+ylabel=$f(x)$]
+	\addplot{x^2+4};
+
+\end{axis}
+\end{tikzpicture}
+
+%2: coordinates
+\begin{tikzpicture}
+\begin{axis}
+[xlabel=$x$,
+ylabel=$f(x)$]
+	\addplot [color=black, mark=o, mark size=12pt]coordinates{
+	(0,0)
+	(1,2)};
+\addlegendentry{Data}
+\end{axis}
+\end{tikzpicture}
+
+%3: csv
+\begin{tikzpicture}
+\begin{axis}[
+%legend style={draw =none},
+legend pos =  north west, % south west, south east, outer
+legend columns = 2
+]
+	\addplot table[x=time, y=voltaje, col sep=comma]{data.csv};
+\addlegendentry{voltaje}
+	\addplot table[x=time, y=corriente, col sep=comma]{data.csv};
+\addlegendentry{Corriente}
+\end{axis}
+\end{tikzpicture}
+
+\end{document}
diff --git a/demos/6-pgfplots/scatter.tex b/demos/6-pgfplots/scatter.tex
new file mode 100644
index 0000000..44e0223
--- /dev/null
+++ b/demos/6-pgfplots/scatter.tex
@@ -0,0 +1,34 @@
+\documentclass{article}
+\usepackage{pgfplots}
+
+\pgfplotsset{width=7cm,compat=1.5.1}
+
+\begin{document}
+
+\begin{tikzpicture} 
+\begin{axis}[scatter/classes={
+    a={mark=square*,blue},%
+    b={mark=triangle*,red},%
+    c={mark=o,draw=black}}]
+    %  \addplot[] is better than \addplot+[] here:
+    %  it avoids scalings of the cycle list
+    \addplot[scatter,only marks,
+        scatter src=explicit symbolic]
+        coordinates {
+(0.1,0.15) [a] 
+(0.45,0.27) [c] 
+(0.02,0.17) [a] 
+(0.06,0.1) [a] 
+(0.9,0.5) [b] 
+(0.5,0.3) [c] 
+(0.85,0.52) [b] 
+(0.12,0.05) [a] 
+(0.73,0.45) [b] 
+(0.53,0.25) [c] 
+(0.76,0.5) [b] 
+(0.55,0.32) [c]
+        };
+\end{axis}
+\end{tikzpicture}
+
+\end{document}
\ No newline at end of file