The duration of Spanish learning levels at Ibero Spanish School lasting for 3 weeks is designed to align with various factors that optimize the learning process:

Intensive Learning: Three weeks could represent an intensive learning period where students are exposed to a concentrated curriculum, allowing for quick progression through the language levels.

Focused Modules: Each level might be broken down into specific modules or themes, making it feasible to cover a particular set of topics comprehensively within the three-week timeframe.

Balanced Progression: The duration is structured to strike a balance between progressing through the material efficiently and allowing enough time for students to absorb and practice what they've learned.

Student Engagement: Shorter durations can keep students engaged and motivated, as they see tangible progress within a relatively short timeframe.

Flexibility and Options: Shorter duration levels provide flexibility for students who might have limited time for language studies or for those who wish to complete certain levels in a relatively quick manner.

Regular Assessment: Three weeks could allow for regular assessment points, ensuring students are evaluated frequently and have opportunities for feedback and improvement.

Customization: The school offers customized learning experiences where students can join classes at different levels based on the school's proficiency, and the three-week duration allows for these different entry points.

Ultimately, the three-week duration for each Spanish learning level is  a strategic approach aimed at optimizing learning outcomes, maintaining student engagement, and providing a structured yet flexible learning environment.