This document summarizes a project at a Madrid school to improve students' English speaking skills in science class. The school implemented a bilingual project in 2005 involving activities like presentations and role plays to get students speaking English more. Challenges included student diversity, lack of motivation, and struggling with science concepts in English. The project tracked individual student progress over time through recordings and reflections. Results showed steady improvement in both English skills and science marks as students gained confidence speaking English about course content.