You as a teacher may choose to evaluate this project in a number of ways.  One possible way is to have students create a portfolio of their research project.  I have made a link here to  a site that describes portfolio assessment.  This site is called Access Excellence-Classrooms of the 21st Century.  Here you will find reasons for using portfolio assessment, description of  portfolio assessment, and a grading rubrick.  To access this site, simply click on "ASSESSMENT" above or on the underlined words directly above.
 

Standard 1:
    Science as inquiry- Students design and complete a scientific investigation in which they apply inquiry skills to find a biological indicator of water quality.
Standard 2:
    Physical Science-Students will measure temperature and dissolved oxygen at the test sites.
Standard 3:
    Life Science- Students will make a correlation between insect larva population and dissolved oxygen.
Standard 4:
    Earth and Space Science- Students will use a GPS unit to pinpoint the location of the test sites.
Standard 5:
    Science and Technology- Students will develop a system model utilizing STELLA.
Standard 6:
    Science in Personal and Social Perspectives- Students will evaluate a biological indicator that determines water quality.