Modeling: Escalator   Design: Beba Shternberg, Michal Yerushalmy. Programming: Alexander Zilber Graphics: Tanya Tsytkin The Escalator is one of three in a set “Modeling”. Before using this software it is recommended to use first the two others: “Modeling: MoveOn”- introducing of graphs representing phenomena, realizing the need in graphs as mathematical objects. “Modeling: The Function Sketcher”- analyzing lines that are components of graphs by concerning their rate of change. Stairs as a model of change. The software allows setting the change of a graph - the derivative of the function (a constant change or a linear change or exponentional change) and to get the appropriate function. Changing parameters in the change will cause to appropriate changes in the function. The software supports not formal qualitative way to construct connection between the function and its derivative, and between the function and its integral. In addition the software helps in understanding the dynamic nature of the derivative as a speed of changing of the function. In this way the user links between a mathematical and physical model of phenomenon. The graphical and the numerical representations make effective the learning process.   Calculus Unlimited MoveOn The Function Sketcher Escalator The Geometric Supposer Math Bundle (5 for the price of 4) Single Copy $50 30$ 30$ 30$ $60 $150 Network Version for 5 $200 120$ 120$ $120 $240 $600 Network Version for 15 $450 $270 $270 $270 $540 $1,350 Network Version for 25 $600 $360 $360 $360 $720 $1,800 shipping rates: 5$ up to weight of 100 grams. All the products are available in PC Win CD-ROM and Network formats. Ordering Information Fax Orders: Please send us by fax your name, address, your credit card, its number and expiration date and the name of the school. Fax number: 972-3-646-0872 For more information please call 972-3-646-0177 or send an e-mail: lilach_r@cet.ac.il