Educational Journals and Blogs:
Journal of Research in Science Teaching: Great journal for general science education research. Published by NARST (National Association for Research in Science Teaching). Articles mostly (but not exclusively) address K-12 education, and are written for an audience of educational researchers.
College Teaching: This is an interdisciplinary journal about how teachers can improve student learning. It includes a wide range of article types, from research, to classroom/teaching tips.
Tomorrow's Professor Blog: A collection of articles and commentaries on general issues concerning higher education. Posts are on a wide range of topics, and frequently include topics related to teaching and learning. On the homepage (http://tomprofblog.mit.edu/) under Categories choose 'Tomorrow's teaching and learning' for archived posts.
Journal on Excellence in College Teaching: Broad journal about all things related to the scholarship of teaching and learning.
Lists of other Education Journals:
Content specific journals: Here are a few of the educational journals I know of in Physics. It would be great for others to add those from their own content areas.
American Physical Society: Physical Review Special Topics PER: Physics Education Research articles, both theory and experimental written for other PER researchers. (First stop for physics related educational research, especially at the college level.)
American Journal of Physics: (Published by AAPT) Physics Education instruction and research articles, written for highs school and college educators and students. The majority of articles are techniques or lesson plans for direct use in the classroom. They publish one or two (sometimes zero) PER articles a month.
The Physics Teacher: (Published by AAPT) Publishes Papers on teaching physics for introductory level teachers. These are almost entirely articles that can be immediately transferred to the classroom.Google Scholar: This (in my opinion) is still the best way to find a scholarly article if you don't have any idea where you should look for it.