I have been following Jacqui Murray's website, Ask a Tech Teacher, for a long time. One of the things I really appreciate on this site is the great list of websites by grade level from Kindergarten through 6th grade. In addition, there are also these additional sites:
I'm always finding wonderful websites to incorporate into my lessons. I also subscribe to Jacqui's Tech Tips. This is located under the tab newsletters.
I highly recommend checking out the Ask a Tech Teacher site and subscribing to the Tech Tips.