The Functionality on NetPad

Modern information technology-assisted teaching is an important teaching means. In mathematics teaching activities, graphical changes can be vividly displayed through dynamic geometry software (DGS). Function is the basic knowledge in mathematics, and the functionality is the basic component of DGS. NetPad, one of the DGS, has more performance and simpler operation compared with other DGS. In this paper, we introduce the functionality of NetPad. It includes user-defined coordinate system, prompt function, expression input, implicit function, polar equation, parameter equation, function surface etc.. And its operation procedure is simpler to drawing curves dynamic trajectory and exploring function curves intersection. Through a teaching case, the superiority of NetPad in functionality is verified.