\documentclass[a4paper,normalheadings]{scrartcl}
\usepackage[T1]{fontenc}
\usepackage[german]{babel}
\usepackage[latin1]{inputenc}
\renewcommand{\baselinestretch}{1.6}
\addtolength{\topmargin}{-1.0cm} 
\addtolength{\textheight}{1.5cm}
\widowpenalty=10000 
\clubpenalty=10000  
\raggedbottom       
\usepackage{fancyhdr}
\pagestyle{fancy}
\setlength{\headheight}{30.0pt}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%          Kopf- und Fusszeile, Nummerierung
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\lhead{SOMMERSEMESTER 2000}
\chead{TITEL DER ARBEIT}
\rhead{OTTO MUSTERMANN}  
\lfoot{}
\cfoot{}
\rfoot{\thepage}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Titelseite und Generierung der Inhaltsangabe
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\begin{document}

\title{ARBEITSTITEL \\ UNTERTITEL}
\author{OTTO MUSTERMANN}
\date{\today}
\maketitle

\thispagestyle{fancy}

\tableofcontents

\newpage

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Die Hausarbeit beginnt hier
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


\section{ERSTES KAPITEL}

bla bla

\subsection{ERSTES UNTERKAPITEL}

bla

\subsection{ZWEITES UNTERKAPITEL}

bla.

\section{ZWEITES KAPITEL}

blub blub

\subsection{ERSTES UNTERKAPITEL}

blub blub blub.

\end{document}