Computer enhanced teaching of computational mathematics on a network system driving graphics terminals is being redeveloped for a mouse-driven, high resolution, windowed environment of a UNIX work station. Preservation of the features of networked access by heterogeneous terminals is provided by the use of the X Window environment. A dmonstrator program has been developed which exhibits interactive access over an Ethernet network and displays the use of B splines for curve fitting. The control of the coordinates by the mouse button allows points to be added or deleted or dragged to a new position while a C program produces the display of the fitted curve. Screen icons control transformations of the curve and permit instant repositioning. Multitasking permits comparison of the results of alternative algorithms in adjacent windows. True format mathematical text, which can be called from a HELP button, is viewable in another window. (Author/DB)