• The Hach Company is a well-respected manufacturer and distributor of water quality testing instruments for science educators through research scientists. Consider the inexpensive portable lab Model 820 (under $500 ), the reasonably priced portable lab Model 850 (under $700 ), or the professional quality portable lab Model 890 (under $1400 ). Test strips are also available for under $50.
• The LaMotte Company is a well-respected water quality testing instrument manufacturer. Products in its catalog are available through outlets listed on the web site. Consider the inexpensive portable lab (under $ 50), the reasonably priced portable lab(under $300 ), or the professional quality portable lab Model (under $2000 ).
• North American Benthological Society Comprehensive catalog of slides depicting most freshwater macroinvertebrates encountered in the field of watershed biological assessment.

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The Woodrow Wilson National Fellowship Foundation 
CN 5281, Princeton NJ 08543-5281 - Tel:(609)452-7007 - Fax:(609)452-0066 
Technical contact: lpt@woodrow.org