Which method is least likely to be effective in continuous professional development?

Isolated self-study of educational literature tends to be the least effective method for continuous professional development because it lacks the interaction and collaborative engagement that significantly enhances learning. Professional development is most impactful when individuals have the opportunity to discuss ideas, share insights, and receive feedback from peers or mentors. Engaging in activities like collaborating on projects, participating in workshops, or being part of professional learning communities fosters an environment of mutual learning and support, which ultimately deepens understanding and application of knowledge. In contrast, self-study can be valuable, but when done in isolation, it often doesn't provide the same level of motivation, context, or practical application that collaborative and interactive methods do.