You can try searching online academic databases, such as Google Scholar (scholar.google.com), ResearchGate (researchgate.net), or Academia.edu (academia.edu), using keywords like "Ejercicios De Espanol Para Extranjeros", "Spanish language exercises", "language learning", or "task-based learning".
Maria Isabel Cobo, Francisco Javier García, and Juan Manuel González (Universidad de Granada, Spain) Ejercicios De Espanol Para Extranjeros 1 Answer Key Pdf
"Design and Implementation of Exercises for Spanish Language Learners: A Study on Task-Based Learning" You can try searching online academic databases, such