These might be helpful, too.

http://owl.english.purdue.edu/owl/resource/670/1/
This is aimed specifically at students writing Psychology research reports, but the advice generalizes well to any science research paper.)

http://owl.english.purdue.edu/owl/resource/727/01/ (Excellent information on effective technical writing techniques.)

http://www.flintsciencefair.org/write.php

http://science-project.com/howtowriteakillerreport.html