Mathematical Communication Ability of Grade XI Vocational High School Students in Solving Problem in Quadratic Function Ayu Nur Oktavia (a*), Tatang Herman (a)
a) Mathematics Education, Universitas Pendidikan Indonesia
Jalan Setiabudi 229, Bandung 40154, Indonesia
*ayunoktavia12[at]upi.edu
Abstract
Mathematical communication ability is one of the most important ability for students to have in improving their understanding on learning mathematics. This research aimed to explore students^ mathematical communication ability in solving problem in quadratic functions using a qualitative approach with a case study method. This research involved 20 eleventh-grade students from vocational high schools in Garut Regency, West Java Province, who had studied quadratic functions. Data were collected through a written test focused on mathematical communication ability and follow-up interviews. The results showed that students failed to meet the mathematical communication ability indicators due to lack of practice in solving contextual questions on quadratic functions. Students with high mathematical communication ability were achieve two indicators of mathematical communication ability, students with moderate mathematical communication ability were only achieve one indicator of mathematical communication ability, and students with low mathematical communication ability did not meet any indicators of mathematical communication ability.
Keywords: Mathematics Communications Ability- Problem Solving- Vocational High School- Quadratic Functions
