Internet2 and Educause, two higher-ed technology organizations, announced  on Tuesday that they are expanding a group purchasing effort that allows member institutions to purchase access e-textbooks from McGraw-Hill at a discounted price. The effort, which began in January with five universities, "aims to advance a new model for the purchase, distribution, and use of electronic textbooks and digital course materials," according to a press release. The program added 20 additional institutions on Tuesday, including both small liberal arts colleges and large state universities. The idea  is that negotiating deals for e-textbook access at the institutional level, as a group, will make it cheaper and easier for colleges and universities to support professors who want to take their courses digital. The first five universities to sign on recently collaborated on a report summarizing the experiences of students and professors in the first semester of the pilot. The results  were mixed.