The Lafayette College Calculus Laboratories -- First Semester These laboratory materials represent the first semester in a three semester scientific and engineering calculus sequence developed at Lafayette College in Easton, Pennsylvania. The course meets three times per week in a conventional classroom setting and a fourth time in a Mathematica lab. The course differs from other Computer Algebra System-based Calculus sequences in several ways. First, the CAS is not in daily use by the students, they still must do most of their computations and algebra by hand.The CAS is included in a weekly laboratory only. This more conservative approach (compared with Calculus & Mathematica, for instance) allows our laboratory with only 28 machines to serve a population of 250-300 calculus students a semester, with availability for occasional use by students in upper level courses as well.The laboratory is typically used to introduce students heuristically to a new topic before they encounter it in lecture or homework. We attempt to use the CAS to expose students to the concepts and techniques of calculus in (the now platitudinous) three ways: graphically, numerically, and symbolically. Another goal of some labs is to introduce our students to applications that were previously too complex for beginning calculus students computational skills. Our sizable contingent of engineers are effectively motivated by this exposure, and increasingly are returning to Mathematica to solve their computational problems in courses beyond the calculus sequence. These labs are not in final form, in fact they have been used in their current Mathematica notebook format only once in the classroom. I would be happy to hear from anyone using or even playing with these labs who might have suggestions on how to improve them. Finally, it should be pointed out that, although I am the final author of all these labs, they are very much the product of a joint effort on the part of the entire math department faculty here at Lafayette. In particular, Cliff Reiter, Tom Hill, and Livie Carducci have either inspired, coauthored, or written an antecedent to virtually every lab in this sequence. You may reach us at Rob Root Department of Mathematics Lafayette College Easton, PA 18042 (610) 250-5280 email: robroot@lafvax.lafayette.edu