SPRINGFIELD — The seven justices of the Illinois Supreme Court took on the role of educators Tuesday night when they hosted legislators for a crash course on the third branch of government.“One purpose of this is to have an opportunity to open the lines of communication if you have questions,” Chief Justice Lloyd A. Karmeier said to the roughly 20 lawmakers in attendance.The lesson, dubbed “Illinois Law School for Legislators,” took place in the Supreme Court building and included an overview …