Interactive Problem Solving For Mechanical Engineering On The World Wide Web

The world-wide-web has established its place in computer-based education due to its great advantages in terms of access, distribution, communication, and timeliness of feedback. However, software for internet-based applications is still far behind that for PC based applications in many respects, most notably in the types of interactive experiences available and in techniques for dealing with mathematical equations and symbols. Researchers at Ohio University are developing a web-based Interactive Problem Solver (IPS) with numerous Java applets and applications that attempt to address some of the limitations of existing web-based educational tools, especially with regards to interactivity. Rather than merely allowing students to change parameters and see the effect on a system response without ever having to “get their hands dirty” developing and solving the equations, the IPS attempts to implement the key features of an intelligent tutoring system (active learning, forced reflection, targeted feedback) by requiring “unguided” student inputs and returning instant formative feedback in both textual and visual forms. The IPS is a student-centered environment for learning Dynamics on the worldwide-web in which the student controls various details of the problems that will be solved, creates free body diagrams by pointing and clicking to select systems and to place forces, enters symbolic equations representing the mathematical model, solves the mathematical model using available computational software, and evaluates the physical realism of the solution. Students are given immediate feedback in direct response to their inputs at every step in the problem solution, but rather than being given the solution they are given hints for discovering what they did wrong and how to correct it. Additionally, tools for assessing student learning and for assessing the impact of the IPS on student learning are integrated within the IPS.