![]() An eActivity application allows the creation of so-called eActivities, which can include figures, expressions, and explanations. Drag and drop, copy and paste, and other pen-based operations, are also supported. Solutions, expressions, and other items can be selected with the tap of the stylus. The user interface features a pull-down menu format. It also comes with graphing tools for 3D graphing and drawing of geometric figures. Factorization of expressions, calculation of limit values of functions, and other operations can be performed while viewing the results on a large LCD screen. The ClassPad 300 allows input of expressions, and displays them as they appear in a textbook. HP and Texas Instruments attempted to release similar pen based calculators (the HP Xpander and PET Project (see TI PLT SHH1), but both were cancelled before release to the market. It resembles Casio's earlier Pocket Viewer line. A large 160x240 pixel LCD touch screen enables stylus-based operation. It comes with a collection of applications that support self-study, like 3D Graph, Geometry, eActivity, Spreadsheet, etc. The Casio ClassPad 300, ClassPad 330 and fx-CP400 are stylus based touch-screen graphing calculators. Family of graphing calculators by Casio Casio ClassPad
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