WHITEOUT: Blackburn, England-based Promethean World, known mostly for its line of interactive whiteboards, recently posted a 23% revenue decline for the first half of 2012. CEO Jean-Yves Charlier will step down but not before pointing the finger at schools' budgetary constraints. Jim Marshall, current head of North American markets for the company, will take the reins. (Education Week has a hold of the financial docs.) The other interactive whiteboard kingpin, Smart Technology, has seen its stock slide from its opening debut above $17 in July 2010 to a low of $1.10 (June 5). It has since recovered a bit and is trading close to $1.60. Smart reports its earnings on Thursday, Aug. 2. Listen for the sound of a slowing market, particularly versus the growing strength of tablets.