Tabular environment misalignment with the section title

Question

Why do I have this misalignment of the table respect to the section title? How can I get rid of it?

\documentclass{article}


\begin{document}
\section{Education}

\vspace{\baselineskip}

\begin{tabular}{rl}
\textsc{4.0 GPA} & \textbf{Undergraduate} \\ 
                 & \textsc{Natural Sciences} \\ 
                 & \textit{University of California, Berkeley}
\end{tabular}

\vspace{\baselineskip}

\section{Classes Taken}

\vspace{\baselineskip}
\end{document}

Answer 1

The tabular environment by default inserts a small amount of horizontal space to the left of the first column. You can control the space between columns with the argument of @{} in the tabular preamble. Putting nothing there removes the space and solves your problem.

\begin{tabular}{@{}rl}
\textsc{4.0 GPA} & \textbf{Undergraduate} \\ 
                 & \textsc{Natural Sciences} \\ 
                 & \textit{University of California, Berkeley}
\end{tabular}

Answer 2

1. if you are not going to insert contents between \section{} and tabular (I mean, if the tabular is the first non empty line) you don't need \noindent.

Otherwise, the second paragraph (the tabular) will be indented and you have to remove it using \noindent.

2. As cited by @Andrew Cashner, you have to remove the empty space at the beginning of the cell making use of {@{}rl}.

MWE

\documentclass{report}  

\begin{document}

\section{Education}

First line here without \verb|\noindent|

\vspace{\baselineskip}

%   \noindent
    \begin{tabular}{@{}rl}
        \textsc{4.0 GPA} & \textbf{Undergraduate} \\ 
        & \textsc{Natural Sciences} \\ 
        & \textit{University of California, Berkeley}
    \end{tabular}

\section{Education}

First line here with \verb|\noindent|

\vspace{\baselineskip}

\noindent %
\begin{tabular}{@{}rl}
    \textsc{4.0 GPA} & \textbf{Undergraduate} \\ 
    & \textsc{Natural Sciences} \\ 
    & \textit{University of California, Berkeley}
\end{tabular}


\end{document}