This is a nice, concise hand out from APA that touches on the main points for evaluating research. In particular, research that has been distilled by science reporters.
It may be a bit light for a traditional research methods class, but I think it would be good for the research methods section of most psychology electives, especially if your students working through source materials.
The article mostly focuses on evaluating for proper sampling techniques. They also have a good list of questions to ask yourself when evaluating research:
This also has an implicit lesson of introducing the APA website to psychology undergraduates and the type of information shared at APA.org. (including, but not limited to, this glossary of psychology terms.)