The document discusses how teacher professional development can be made more effective through the use of Web 2.0 technologies. Standalone workshops typically only change teaching practices 5% of the time due to a lack of follow up support. Web 2.0 allows for ongoing professional development through learning communities and interactions between teachers. It also enables coaching support from administrators. When these additions are utilized, professional development can affect teaching practices and increase learning up to 90% by better equipping teachers to pass on their new knowledge to students.