When it came to stealing, Catherine Crosier knew she couldn’t do things all at once. But doing it often in small quantities wasn’t enough to escape detection either. Crosier, 45, pleaded guilty in U.S. District Court on November 27 to embezzling more than $45,500 from the Maine Education Association (MEA), the state affiliate of the National Education Association representing some 25,000 elementary, secondary and higher education employees. Crosier, a resident of Augusta, pleaded guilty to writing about 180 checks to herself or to petty cash over the period June 2002-January 2004, until she was confronted by her supervisor.