Introduction : studying and learning skills are the most important abilities that can increase educational motivation and improvement. Most students did not meet success during educational period due to the poor skill ability in learning and studying.

This research has carried out in order to compare the successful and unsuccessful students ith related to the study's methods in Yazd medical university.

Methods : This is a descriptive-analytical research. The participants of this study were medical, nurse and midwifery students of Yazd medical university. Successful student (SS) and unsuccessful (USS) was defined as 10 % of upper part of highest (n=46) and 10 % of lower part of lowest (n=45) average university, respectively and recruited in this study.

The data of this research were been collected by questionnaire. Its reliability proved by three learning specialists and its validity was determined using test-retest at the intervals of two weeks on 30 students (r=0.765) data analyzed by SPSS software using Pearson correlation and t- test.

Results : There was a significant difference between two groups according to their average in diploma (17.21 vs 13.39) and university average (11.74 vs 18) in SS and USS groups, respectively. The SS comparing to unsuccessful ones had an effective method for studying (using the pq4r method , organizing the topics ,active reading , question setting and reading for getting the answers ) and have a better studding habits (studying time table , being active at class , studying before class, studding after class ) as well.

Conclusion : Our results showed that it is necessary to design educational effective skills for training and studying especially in students who had a pervious educational failure.