Computer programming is the basic skill that has to be possessed by students who attend Algorithm and Programming courses. This requires a problem solving strategy involves large number of logic activities. The purpose this study offer collaborative learning environment in order provide experience interacting socially. However, social interaction does not just happen; appropriate guiding strate...

this paper presents a rational haar wavelet operational method for solving the inverse laplace transform problemand improves inherent errors from irrational haar wavelet. the approach is thus straightforward, rather simple andsuitable for computer programming. we define that $p$ is the operational matrix for integration of the orthogonalhaar wavelet. simultaneously, simplify the formulaes of li...