It seems you are looking for the teacher’s book (libro del profesor) or the supplementary materials for the Spanish textbook Aula Internacional 4 Plus (the updated version of the classic Aula 4).
Connectors: Giving your speech and writing a professional, cohesive flow. aula internacional 4 plus top
If you used older versions of Aula Internacional (the ones with the orange or blue stripes), the "Plus" version (usually white/red cover) is a massive upgrade. It seems you are looking for the teacher’s
Multimedia & Digital: Each unit features integrated videos and audiovisual "capsules" focused on colloquial language. ✅ Ideal for: Adult learners in a class