This paper presents a computer based diagnostic tool developed to facilitate the learning process. The developed tool is capable of generating possible error syndromes associated with the answers received. The developed tool simulates the error pattern of the test results and then accordingly models the action plan to help in children's learning process. The built-in tests are designed in such a way to consider the procedural, factual and conceptual knowledge of the learning topic. The tool considers aspects related to both, the learner and the instructor. It generates a diagnostic report to be utilized by the instructor. Moreover, the report suggests remedial advices to enhance process of the learning in cases when the learner experiences severe learning difficulties.