Are you looking for some hands-on science curricular materials
Free: check out http://www.google.com/search?tbm=bks&tbo=1&q=Carolina+Biological+Supply+Co&btnG= for older versions of hands on science units that still have what to offer.
Also, you can go to http://www.caboces.org/mst/science-kits for some free science kits that meet NY State standards.
inexpensive: Finally, http://www.espsciencetime.org/ who have science kits which are relatively inexpensive. It might cost you more to print out the science units on your own printer than to order theirs online.