I found this resource at NECC. It's www.eduMedia-share.com and www.eduMedia-sciences.com . eduMedia-share has hundreds of multimedia resources. Many of them are for higher level science courses. There seemed to be more k12 resources on the science site. Some of the resources are interactive. Resources on the edumedia-Share site are free. There is a subscription required for those on the edumedia-Science site but you can get a very nice and useful preview of lots of resources.
One of the resources was on how cuttings can be made from healthy plants.
Another useful simulation was on bee pollination.
