In John Hattie's Visible Learning, how many influences fall in the "zone of desired effects"?

In John Hattie's Visible Learning, the "zone of desired effects" refers to the influences on student achievement that have a significant positive impact on learning outcomes. This zone encompasses influences that yield effect sizes typically regarded as beneficial for educational practices. The number identified within this zone is 69, indicating a clear focus on strategies and approaches that have been validated through evidence to promote effective learning.

The research conducted by Hattie synthesized numerous studies, revealing that certain teaching strategies, influences, and methodologies lead to more substantial improvements in student learning. These influences are categorized based on their effect sizes, and being part of the "zone of desired effects" signifies a strong endorsement for their implementation in educational settings.