I was looking at the Recruiting Timeline here: http://www.hsbaseballweb.com/recruiting_timeline.htm
And, in June/July of the Freshmen year, it recommends:
Attend a college baseball program's "week long" camp
This is the best way to "get noticed" by your favorite school. Many colleges sign players as a result of their attendance at the camps.
Is this the recommendation for every H.S. freshmen player? Or, just those who are actually ready to showcase something?