In Mathematic, student’s reading comprehension ability can be seen in their ability to change contextual Math problems into Math models. The ability of student changing a text which contain Math problems into Math models must have connection with their ability in understanding geometry problems. Considering that rigor level, the highest level of geometry thinking ability, a deep understanding and high rigor for student to understand the text. There must be a correlation between students’ reading comprehension ability and geometry thinking levels. The subjects of this research are 31 students of 10th grade in science class. They were given van Hiele Test to check their geometry thinking levels. The result of this research shows that the result of students’ thinking level test and reading comprehension test has 0.466 as coefficient of correlation which means that there is a positive correlation between both abilities, the correlation is not strong.

This research aims to describe the effectiveness of the learning cycle model (LC-5E) with Lesson Study for Learning Community (LSLC) to build students creative thinking skills in algebraic forms. The research procedures Consists of three stages: preparation of learning instruments, validation and revision, and the implementation of research. Data collection using Triangulation methods and creative thinking tests is based on The Torrance Test of Creative Thinking (TTCT). The data analysis shows that: the implementation of the lesson plan is very good category; the frequency of student activity that stands out is collaborative learning with positive responses to learning models; classical completeness of students algebraic ability are increase, creative thinking indicators achieved are fluency and flexibility, the not creative and less creative students are decrease, and the creative and very creative students are increase accompanied by growing collaborative learning and jumping task. Based on the results of data analysis, it was concluded that the implementation research is effective.