Apple is expected to unveil at least one new low-cost iPad model at next week’s education event, Bloomberg reports. The event, announced last week, is being held on Tuesday at Lane Technical College Prep High School in Chicago, and is the first time Apple has held an education-related event since 2012 when it unveiled textbooks and the iBooks Author tool. According to Mark Gurman, Apple will be showing off a new version of its entry-level iPad,…