Hi EJF - You are right to be considering the issue of informed consent. It's an important aspect of your research, and there are specific rules for how consent is handled. There is a summary of the rules, based on ISEF rules, on the Science Buddies site: http://www.sciencebuddies.org/science-f ... ects.shtml
If you follow the link on that page to the ISEF 2009 rules, you'll find both the rules for working with human subjects (http://www.societyforscience.org/isef/rules/rules7.pdf
) and a bit of information dealing specifically with how to obtain consent for surveys conducted via the Internet (http://www.societyforscience.org/isef/p ... netConsent
If the IRB has determined that you have to have consent, the form for consent is the Human Subject Form on page 42 of the complete rule book: http://www.societyforscience.org/isef/d ... es2009.pdf
You would have to make that form available to parents/guardians and have them complete it and return it to you (faxed or scanned and emailed) and then provide them with a link to the survey (or the emailed questions, depending on how you are conducting your survey).
Have you spoken with teachers at your school or at local colleges about possible mentorship? You might find this information about finding a mentor helpful: http://www.sciencebuddies.org/science-f ... tors.shtml
Good luck with the project and at ISEF!