Post text appearing after sidebar

Hi there,

This might be a daft error – but please bear with me, it’s my first attempt at using my own theme 🙂

I created a theme from a static html site and all has gone well apart from the fact the text of the top post doesn’t appear directly under the title – there’s a large white space after the title which appears to be the length of the sidebar. I’ve checked the div widths etc but nothing seems to solve it.

site is : http://amy-englishteacher.com/wp/ and it’s in test mode.

Any pointers or advice for this newbie would be much appreciated.

Thank you
Miriam