{"last_modified": {"type": "/type/datetime", "value": "2010-12-04T12:26:33.453642"}, "title": "Teaching and learning elementary and middle school mathematics", "created": {"type": "/type/datetime", "value": "2009-12-10T05:18:42.998577"}, "subjects": ["Mathematics", "Study and teaching (Elementary)", "Study and teaching (Middle school)"], "latest_revision": 2, "key": "/works/OL4079604W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL763848A"}}], "type": {"key": "/type/work"}, "revision": 2}