Here is a site I've used as a school counselor to direct IBDP students to when dealing with stress. It can help them identify stressors, the good an bad things about stress and there are helpful resources (goal setting worksheets, journals etc) to help in the management of stress. May be a helpful site to direct students to when covering Stressors when teaching about Health Psychology. It provides a practical application to what is being covered.

Everyone loves a good TED talk. Here are some fun ones HS students would enjoy about Developmental Psychology. I like that you can filter the videos by psychology sub-topic AND Student Level as well.

I find the following three sites very useful. There are classroom resources (videos, lesson and unit plans, revision guides) and opportunities to network/get ideas and feedback from other high school psychology teachers.

http://www.thinkib.net/psychology (essential for teaching IBDP)

http://www.apa.org/ed/precollege/topss/index.aspx (not IB specific, but tons of resources)

http://teachpsych.org/ebooks/index.php (I like it for the e-books. Since I living in Africa (first Mozambique and now Tanzania) it is VERY difficult to get resources. I often have to plan months ahead to purchase during holidays or I have to find someone returning from the UK or the USA to bring books back. Anything electronic is great!).