TES Connect

Here is a great site from the UK with free teaching resources.  In the resources section there are thousands of teacher created lessons (lesson plans, activities, games, teaching ideas and worksheets as well as ready-made powerpoint presentations), All you have to do is sign up (which is free) and you get access to all of these resources.  There are tons of them!  It's divided by section: Early Years (Preschool), Primary, Secondary, Whole School and Special educational needs and then also by subject.  Although geared for UK teachers most stuff is relevent or just needs to be mildly adjusted.  It saves a lot of time in preparation.  I have used it many times to help present lessons on different religious celebrations.  The powerpoint presentations were great to use on my smartboard.  The other good thing is that it's all created and submitted by teachers so it's already tried.  Users can also vote on a specific resource so you can see how much it was liked by others.  It's worth a browse!

http://www.tes.co.uk/teaching-resources/

Freeplay music

This site is a fantastic resource to find different background music for powerpoint music or even as theme music for movie projects. It is easily searchable according to type, tempo, style and feel.  There are many different royalty-free instrumentals available.  It can give a really original feel to any presentation you create.
http://www.freeplaymusic.com/search/

Sexuality and U

Sexuality and U is a fantastic Canadian website about sex and sexuality. For teachers wishing to teach sex ed there are powerpoint presentations, lessons plans and webquests. Many of the tools are available in powerpoint or PDF. Sexuality and U also has sections for teens where they can get honest answers to their questions and even a fun quiz to test their knowledge. A great find for a sex ed. teacher!

Website: http://www.sexualityandu.ca/