\contentsline {section}{\tocsection {}{}{Introduction}}{1} \contentsline {section}{\tocsection {}{1}{Approximation for hypersurfaces of low degree}}{2} \contentsline {section}{\tocsection {}{2}{Ordinary singularities reviewed}}{5} \contentsline {section}{\tocsection {}{3}{Managing free curves}}{7} \contentsline {section}{\tocsection {}{4}{Weak approximation at places with ordinary double points}}{9} \contentsline {section}{\tocsection {}{5}{Applications to cubic hypersurfaces}}{16} \contentsline {section}{\tocsection {}{}{Appendix: Recent developments for hypersurfaces of low degree}}{17} \contentsline {section}{\tocsection {}{}{References}}{18}