Including appendices problem

How do I create appendices chapter in my thesis in a proper way? Currently I am suing the following code:

\begin{appendix}
\renewcommand{\chaptername}{}

\chapter{appendices}\label{ch:appendices}
\section {aaa}
\section {bbb}

\end{appendix}


But, when I use this code I have a problem, where LaTeX is verifing the appendices as CHAPTER A in the list of content. How do I get rid of CHAPTER A?

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Welcome to TeX.SX! :) You don't need to sign your questions, your name automatically appears at the bottom. –  Count Zero Jun 12 '12 at 19:19

\appendix is a declaration and not an environment.

I'd say that

\appendix
\chapter*{Appendices}
\markboth{Appendices}{}

should solve your problem. The sections will be numbered A.1, A.2 and so on.
@Aymen In case of more than one appendix, usually one doesn't say simply "Appendices", but rather \chapter{TitleA}, \chapter{TitleB} and so on. Otherwise your reader won't have clues why the numbering has changed. –  egreg Jun 13 '12 at 6:30