<p>&lt;div&gt;&lt;div&gt;&lt;div&gt;&lt;p&gt;&lt;b&gt;&lt;span&gt;Updated Edition of Bestseller!&lt;/span&gt;&lt;/b&gt;&lt;/p&gt;&lt;p&gt;The updated and expanded second edition of this classic text provides new research and insights into how principals can encourage the teacher development that enhances student learning.</p>