<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">There appears to be the assumption that participating in professional development improves instruction. I would not be surprised to find an small positive effect but could it be that the 'better" instructors attend PD while the others.....<div><br></div><div><br></div><div><div apple-content-edited="true"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div>Roger Berg</div><div>Strategic/Community Planner</div><div>Literacy Program of Greater Plymouth at the Plymouth Public Library</div><div>11 Hall Street</div><div>Plymouth, MA 02360</div><div>508 746 6345</div><div><a href="mailto:roger_berg@mac.com">roger_berg@mac.com</a></div></div></div></div></div></body></html>