There are a few reasons why structured informal education is not a common thing.

• It can be difficult to define. The term “informal education” is often used to describe any learning that takes place outside of a formal classroom setting. This can include a wide range of activities, from reading a book to watching a documentary to talking to a friend. It can be difficult to create a structured learning experience that encompasses all of these different types of activities.
• It can be difficult to assess. In formal education, learning is typically assessed through tests and exams. This allows educators to measure how much students have learned and to track their progress over time. However, it is more difficult to assess informal learning. This is because informal learning often takes place in a variety of settings and is not always focused on specific learning outcomes.
• It can be difficult to find funding. Formal education is typically funded by governments or school districts. However, there is no single entity that funds informal education. This can make it difficult to find the resources needed to create and deliver structured informal learning experiences.

Despite these challenges, there are some examples of structured informal education. For example, some museums offer educational programs that combine informal learning with more structured activities, such as hands-on workshops or guided tours. Additionally, some community organizations offer informal learning programs that are designed to help people develop specific skills, such as job training or financial literacy.

As informal learning becomes increasingly recognized as an important part of lifelong learning, there may be more opportunities for structured informal education in the future. However, it is likely that these programs will continue to face the challenges of definition, assessment, and funding.