Bilingual education currently faces the challenge of improving teacher training to meet the linguistic and didactic demands of a content and language integrated approach. Our paper analyses what Spanish in-service primary school teachers consider the key training priorities for their involvement in bilingual programmes. Using content data analysis, we have detected the most frequently used terms in the teachers' answers to an open-ended question. 2,830 words were examined, and the net of relations among the training priorities emerging from their discourse was established. Our results confirm that teachers prioritise the need to be proficient in English over methodological issues, which prevail once language proficiency has been achieved. They highlight investment as being crucial both to implement school bilingual programmes and to provide training opportunities for their professional development. Our study concludes that only concerted personal and administrative efforts will bridge the gap between global educational agendas and classroom performance.