Now-a-days the amount of data stored in educational database increasing rapidly. These databases contain hidden
information for improvement of students’ performance. Educational data mining is used to study the data available in the
educational field and bring out the hidden knowledge from it. Classification methods like decision trees, Bayesian network etc can
be applied on the educational data for predicting the student’s performance in examination. This prediction will help to identify
the weak students and help them to score better marks. The C4.5, ID3 and CART decision tree algorithms are applied on
engineering student’s data to predict their performance in the final exam. The outcome of the decision tree predicted the number
of students who are likely to pass, fail or promoted to next year. The results provide steps to improve the performance of the
students who were predicted to fail or promoted. After the declaration of the results in the final examination the marks obtained by
the students are fed into the system and the results were analyzed for the next session. The comparative analysis of the results
states that the prediction has helped the weaker students to improve and brought out betterment in the result.