at the high school level the ability to understand the mathematical concepts of learners is an important foundation for solving mathematical problems. This is in line with one of the goals of learning mathematics in primary and secondary education is that learners understand the concept of problems mathematically. Understanding the concept is one of the mathematical skills that must be mastered in learning mathematics. teachers should be good at choosing creative and innovative learning models to apply, with the aim that learners can be actively involved in the learning process.This study aims to determine the difference of enhancing the ability to understand the mathematical concepts of learners who are given the application of Scramble learning model and Time Token Arends (TTA) with conventional learning model. this research is run by using a quantitative approach with quasi experimental design method (quasi experimental design). data collected through observations, interviews, tests, and documentation. based on the results of research and calculation of n-gain with the highest value in the experimental class that is 1,000 and the lowest value 0.562. while the control class with the highest value is 0.818 and the lowest value is 0.235.The average n-gain obtained by the experimental class is 0.651 and the control class is 0.454. then the results of analysis and data processing using t-test obtained= 4.690 and = 2.010. with a significant level of 5%. the calculation results show that >, in other words reject  and receive so it can be concluded that the enhancement of the ability to understand the mathematical concepts of learners with the model of learning Scramble and Time Token Arends (TTA) is better than conventional learning model.