This research is aimed at finding out the influence of lecturers' language style on students' academic self-efficacy in higher education in Indonesia. This research is conducted to describe the correlation between lecturers' language style and students' academic. As one of the aspects of forming academic self-efficacy, language style has an important role because someone who can get information verbally about his ability in mastering certain duty tends to do more efforts. In addition, it makes him more diligent in doing a duty. Also, language style positively increases the student's self-confidence and vice verse. This research involves seventy students who fill in the questionnaire about the lecturer language style and academic self-efficacy scale. Data were analyzed by using simple linear regression analysis. The result of the research shows that lecturer's language style has a coefficient of determination of 23.5% towards the students' academic self-efficacy. Finally, this research affirms that positive lecturer language style can improve the students' belief towards their ability while the negative language style can weaken the students' self-efficacy. This is supported by the statement of Pajares (2002) who state that the negative language style can easily weaken the students' self efficacy.

This research discusses the application the Tamyiz method based demonstration in learning Arabic as a measure to accelerate the understanding the content ofsharf through tamyiz methods for the students of second semester of Arabic Education Program (PBA) Tarbiyah Faculty and Science Teaching (FTIK) Inistitut Islamic Studies (IAIN) Kendari. This research is the Classroom Action Research (CAR), which is conducted within two cycles and three actions. The first cycle consists of four steps, are: Planning, action or measurement, Observation, Reflections.The results indicated that the application of Tamyiz methods based demonstration to accelerate the understanding content of sharf for the students of the second semester of PBA FTIK IAIN Kendari. From the total 20 students in pre-cycle it obtained that the total score 1257, and the average score of students is 62.85, the highest score is 85 and the lowest one is 50. There are two students who complete the minimum mastery score (KKM) 75. At the first cycle, the total score takes up 1476.88 with the highest score is 89 and the lowest one is 61.5 to obtain the average score 73.844 which represented an increase about 10.827, and nine people or 45% obtain the competence standard score. Meanwhile, the second cycle gain the total of score up to 1670 with the average score is 83.5 and the highest score is 100, and also the lowest one is 70. In this cycle, there are seven students or 85% who pass the passing grade.