{"first_sentence": {"type": "/type/text", "value": "Supervisory practice has evolved since its origins in colonial times, and its effectiveness as a means of improving instruction depends on the ability of educational leaders to remain responsive to the needs of teachers and students."}, "physical_format": "Paperback", "subtitle": "Strategies and Techniques", "last_modified": {"type": "/type/datetime", "value": "2008-04-30 09:38:13.731961"}, "weight": "1.2 pounds", "languages": [{"key": "/l/eng"}], "publishers": ["Corwin Press"], "number_of_pages": 242, "isbn_13": ["9780761939696"], "id": 12783588, "edition_name": "Second Edition edition", "isbn_10": ["0761939695"], "publish_date": "August 14, 2004", "key": "/b/OL9492178M", "authors": [{"key": "/a/OL1469154A"}, {"key": "/a/OL408856A"}], "title": "Supervision That Improves Teaching", "type": {"key": "/type/edition"}, "subjects": ["Educational administration", "Teaching skills & techniques", "Teacher effectiveness", "Education / Teaching", "Education", "United States", "Administration - General", "Education / Administration", "Effective teaching", "School supervision"], "physical_dimensions": "10.8 x 8.4 x 0.6 inches", "revision": 1}