The success of Reading to Learn (R2L) in improving literacy skills in several countries in the world encourages teachers in Indonesia to implement it. In accordance with the national literacy movement program developed by the government, this strategy will greatly assist the ability to read and to write of Indonesian students, not only for foreign language learning but can also be applied to local language learning. For this reason, this study aims to study to what extent the reading to learn the strategy (R2L) helps the students of Sundanese Language Education at UPI in improving their writing skills. This study employed action research by using data recording techniques and documentation. The results revealed that there are difficulties faced by students in Sundanese language writing as the result of an incorrect understanding of concepts in learning at primary, secondary, and high school levels. However, after implementing the R2L strategy it turns out that the effect is quite good as it is seen from the students writing improvement exposed in each cycle. It can be concluded that the R2L strategy implementation is very helpful for students both in writing appropriate Sundanese language and understanding the reading text. This strategy can also be implemented in local language teaching and learning at each level.