The Boston Museum of Art sent out a letter to educators last week saying they would no longer be able to access the museum’s slide library for use in their classes. The slides, which are used in senior and community centers to educate the public about the MFA’s collection, are being stashed while the museum focuses its energies on putting digitized images on its Web site. A discouraged teacher laments, ending “‘rental privileges for slides from the MFA slide collection takes away our most valuable teaching tool, and the loss of this tool will result in the cancellation of many of our courses,”’ and possibly the loss of the 15,000 – 30,000 new MFA customers each year. – Boston Globe