"The idea of a primary source is that it is a firsthand source of information; in the sciences, that means that primary sources are reports by scientists concerning research they have done, containing the data they have gathered, the hypotheses they have formed, experiments and/or observations, and conclusions. Typically these reports take the form of studies published in a scientific journal." Analyzing Primary Sources, from Today's Science.
The new NY State Science Standards include analysis of scientific claims and arguments, such as those found in scientific research reports:
Today's Science Database. (Find it on RFA 24/7 interface. pw=books)
The articles in this database offer clear reporting of interesting science news, and reference relevant research studies. Browse the latest articles on its home page (pw=books), or go to their topic index page to narrow your search.
Gale Science in Context Database (Find it on RFA 24/7 interface. pw=books)
Search by your topic, then narrow by "academic journals" (on the right.)
Gale Expanded Academic ASAP (Find it on RFA 24/7 interface. pw=books)
Search by your topic, then narrow by "academic journals" (on the right.)