Many colleges recommend or require students to submit SAT Subject Test scores. Sometimes it is not easy to guess which score the college likes. The list of recommendation found in Carnegie Mellon University page is a good list to follow depending on the major student is interested in. Click the link above for more details.
AP, ACT, SAT, SAT subject tests, and even GRE. This page is a one page resource for all these standardized test dates.
Not sure when to do what in order to get into good colleges? Click on the link above to see some examples to consider when developing your own plan for the college.