\documentclass
[kulak] % options: kulak (default) or kul, handout
{kulakbeamer}
\usepackage[dutch]{babel}
\usepackage[T1]{fontenc}
\title[Korte titel]{Lange titel}
\subtitle{Ondertitel}
\author[Korte naam]{Lange naam}
\institute[Kulak]{KU Leuven Kulak}
\date{Academiejaar 2020 -- 2021}
%% Overview at begin of each section; delete if unwanted.
\AtBeginSection[]{
\begin{frame}
\frametitle{Overzicht} %Change to "Outline" for English presentation
{
\hypersetup{hidelinks} %disable link colors
\hfill {\large\parbox{.95\textwidth}{\tableofcontents[currentsection,hideothersubsections]}}
}
\end{frame}}
\begin{document}
\begin{titleframe}
\titlepage
\end{titleframe}
\begin{outlineframe}[Overzicht]
\tableofcontents
\end{outlineframe}
% % % Here you go % % %
\section{Inleiding}
\begin{frame}
\frametitle{Inleidende frame}
Inleidende tekst.
\end{frame}
\section[Korte titel]{Lange hoofdstuktitel}
\begin{frame}
\frametitle{Frame-titel}
Tekst.
\end{frame}
\section{Besluit}
\begin{frame}
\frametitle{Afsluitende frame}
Afsluitende tekst.
\end{frame}
\end{document}