Acknowledgments

First and most importantly, I thank my collaborators on the 1993 version of this manual, Priscilla Laws, David Sokoloff, Ronald Thornton, and especially Maxine Willis, who was the lead author of that version. This manual draws heavily on their work and incorporates many ideas developed both independently and collaboratively by all of us.

I thank the following for their help, encouragement, support, and collaboration on various aspects of the development of this approach to teaching Newton’s laws: John Layman, Emily van Zee, and Fred Goldberg.

I thank Lillian McDermott and Arnold Arons for their inspiration.

I thank the leadership of the AAPT/PTRA program and my colleagues in the program who have made corrections, suggestions, provided inspiration, and tried out the ideas. I particularly want to thank David Spitzer for co-leading many of the workshops that led to this book and for valuable suggestions. I am much indebted to Jim Nelson for his thorough review, comments, and suggestions, most of which have been incorporated in the final version. I would also like to thank Juan Burciaga of the AAPT Publications Committee and an anonymous reviewer for valuable suggestions, many of which have been incorporated in the final version.

Finally, I thank my students, who have had the patience to try these activities, and hopefully learned some physics in the process.

—Robert A. Morse Physics Master Emeritus St. Albans School, Washington, D.C.