This study aims to develop e-module teaching materials by applying kvisoft flipbook maker on the subject of the set. To view teacher and learner responses to e-module teaching materials using the kvisoft flipbook maker application on the subject of the set. The method of this research was conducted using Research & Development method of Borg and Gall model which has been modified by Sugiyono covering 7 stages: 1) Potential and Problem, 2) Collecting Data, 3) Product Design, 4) Design Validation, 5) Design Revision, 6) Product Trial, 7) Product Revision. The results of this study indicate that the value of feasibility by the material experts scored an average of 3.23 with good criteria and value of feasibility by media experts with an average score of 3.28 with very good criteria, while the value of feasibility by linguists got a flat score 3.02 with good criteria. The response of the students was very interesting, with the achievement of the average score of 3.33 small group trials and the achievement of the average score of 3.49 field trials, the teacher's test response was very interesting with the achievement of an average score of 3.64. This shows that the e-module using the kvisoft flipbook maker application generated in this study is considered feasible for use in the mathematics learning of the set matter.

The purpose of this research is to know whether there is influence of learning model of Geogebra-assisted Discovery Learning to understanding mathematical concept, to know whether there is influence between learners who have cognitive style of FI and FD to understanding mathematical concept, to know whether there is interaction between learning of Discovery Learning Unity Geogebra with the cognitive style of learners towards the understanding of mathematical concepts. This research type is quasi experiment research, population in this research is all students of class VII of SMP Negeri 2 Bandar Lampung, sampling technique in this research use class random technique where class VII-8 as experiment class 1 with study of Discovery Learning assisted geogebra, Class VII-7 as a control class with Discovery Learning learning with Microsoft Power Point. Technique of data analysis in this research use two way Anova test with unequal cell. Based on the test results, the first hypothesis is indicated by the statistical price of 8,871 (p 4,001), so that H0A is rejected with the conclusion that there is influence of Discovery Learning learning by geogebra toward the understanding of mathematical concept. For the second second hypothesis is shown with a statistical price of 5.23 (p 4,001), so H0B is rejected with the conclusion that there is an influence between learners who have cognitive style of FI and FD on the understanding of mathematical concepts. For the third hypothesis, it is shown by the statistical price of 1.05 (p 4,001), so H0AB is accepted with no conclusion there is no interaction between the learning of Geogebra-assisted Discovery Learning with the cognitive style of learners towards the understanding of mathematical concepts.

The purpose this research is to know whether there is the influence of Learning Cycle 5E model with the GeoGebra aid to understanding mathematical concepts. The type of this research is quasi-experimental research, population in this research is all students of class VII MTsN 2 Bandar Lampung as many as 10 classes with an amount of 320, sampling technique in this research using a classroom random technique where class VIIA as experiment class with Learning Cycle is learning 5E aided GeoGebra, class VIIJ as a control class with expository learning. Data analysis technique use N-Gain test and t test. Based on the result of N-Gain value analysis, the understanding of mathematical concepts in the experimental class with the use of GeoGebra application is in the medium category, that is in the experimental class there are 18 students and in the control class, there are 16 students. While the average value of N-Gain in the experimental class is 0.686 and the mean value of N-Gain in the controller class is 0.354. Based on calculations obtained t count = 6,180, so titan table, in other words, reject H0 and received H1. The conclusion that can be drawn is that there is an increase in the ability of understanding the mathematical concepts of learners in the Learning Cycle 5E class with GeoGebra in the learning process, it also shows that the application of GeoGebra has a positive influence on the improvement of the ability of understanding mathematical concepts in the learning process.