The purpose of this study is to improve the mathematical understanding ability of junior high school students through the application of contextual learning model type Hands-on Activity (HOA) and SAVI learning (Somatic, Auditory, Visual, and Intelectual). The design of this study uses a comparative casual. The research sample consisted of 55 VIII grade students of SMPN 10 Cimahi, West Java. The research instruments used were test and non-test instruments. The test instrument consisted of mathematical understanding questions about the construction of the plan figures, and the non-test was in the form of a questionnaire of students' responses to the learning strategy. Hypothesis testing used was the t-test at a significant level (α = 0.05). The results of the study show that: are 1) The students' mathematical understanding ability has increased in the moderate category, 2) There is a difference in increasing mathematical understanding ability between students who obtain the contextual learning model type Hands-on Activity (HOA) and students who obtain the SAVI model (Somatic, Auditory, Visual, and Intellectual, 3) Students respond favorably to the contextual type of Hands-on Activity (HOA) learning model and the SAVI learning model.