his type of research is Class Action Research. Where the subject of the research is the grade X5 SMA Negeri 1 Angkola West which consists of 38 students. While the techniques and tools to capture data that is now, tests and observations. The percentage of students on mathematical disposition now cycle I was 50.26% to 81.57% in cycle II. With the amount of the percentage increase in students ' mathematical disposition of 31.31%. Understanding of the mathematical concepts of students increases, it is retrieved from the percentage of the cycle I 52.63% become 81.39% in cycle II, students and the amount of the percentage rose 28.94%. Students learn math activity increases; it is retrieved from 63.98% percentage of the cycle I and 63.98% in cycle II. With the amount of the percentage increase in the activity of students of 22.94%. The ability of the teacher to manage learning percentage amounted to 64.00% in cycle I and cycle II 83.00%, with an increase of 19.00%. The results of this study showed that the learning model Treffinger might improve the understanding of mathematical concepts and disposition of the students of class X5 SMA Negeri 1 Angkola West.Keywords: The Learning Model Treffinger, understanding Mathematical concepts, Dispositions, SPLDV.

In fact, the teaching materials are still using teaching books, so in the learning media courses will be developed based on digital art teaching materials at Universitas Muhammadiyah Tapanuli Selatan. In the development of the teaching materials contain teaching materials tailored to the curriculum that applies with the tools and materials contained in the environment. Research objectives to know the expert opinion on the feasibility test and influence of the development of digital art-based teaching materials. Research and Development (R&D) method of ADDIE model (Analyze, Design, Development, Implementation, and Evaluation). For the average result of expert validator assessments on this study covers aspects of feasibility standards based on BSNP by 3.27, then the validity criteria is quite good (quite valid and need revision). The result of student learning creativity Assessment was obtained at 3.18, hence the creativity category is creative.

This research aims to gain a practical guidebook on integrated SCIENCE Class VII semester odd with the utilization of the natural resources of South Labuhan Batu Regency. (1) the test to find out the feasibility of integrated SCIENCE practical guidebook on Class VII semester has developed an odd fit standard BSNP. (2) to find out the opinions of teachers and professors against the practical guidebook on integrated SCIENCE Class VII semester has developed an odd fit standard BSNP. The entire sample is selected by means of purposive sampling. Samples are defined in this study (1) Professor of biology, physics and chemistry University of Muhammadiyah South Tapanuli S2 education criteria amounted to 3 people. (2) integrated SCIENCE teachers in district of South Labuhan Batu Regency Torgamba from some schools with Undergraduate education criteria. The results of the deliberations of the research (1) to the average value of all aspects of the standard of eligibility based on the criteria of 4.30 BSNP is validitasnya { very valid and do not need revision (very decent)}. (2) the standard eligibility content was of 297 as well as an average rating of 4.30 by respondents lecturer and 613 and the average rating of 4.44 by the respondent teachers IPA. The standard language is the feasibility of 193 and an average rating of 4.29 by the respondents to the lecturer and 356 and the average value of 3.96 by respondents to the teachers of the IPA. The eligibility standards of presentation is of 206 as well as an average rating of 4.43 by respondents lecturer and 415 and the average rating of 4.32 by respondents to the teachers of the IPA. The eligibility standard kegrafikan is 476, as well as the average value of 4.29 by the respondents to the lecturer and 963 and the average rating of 4.34 by respondents to the teachers of the IPA.

Video is an electronic media that is able to combine audio and visual technology together so as to produce a dynamic and interesting impression. The purpose of the study was to find out the assessment of expert validators in viva video learning media feasibility test based on BSNP questionnaire. The benefits of this research provide interesting and enjoyable learning activities so that students become more active in learning, as well as enrich the teacher’s knowledge about alternative learning media. The average result of all aspects of the standardized due diligence based on the BSNP questionnaire before revision 3.12 with validity criteria is quite good {Quite valid and needs revision}. Meanwhile, after revision 3.76 with validity criteria both {Valid and do not need revision (feasible)}. The development of viva video media in electrolyte and non electrolyte solution material is expected to be applied to students in school. Keywords: Viva Video; digital art; learning media; BSNP