A set of 5 open-ended problems (one for each day of the week) applying the concept of infinite limits to rational functions, taking an informal approach that's suitable for most levels. Students get to explore the numeric and graphic properties of a rational function, including using a graphing calculator. Modeled after those types of open-ended questions that appear on state standardized graduation tests. Comes with answer keys and a 4-point scoring rubric that's applicable to all 5 problems in the set. Can be used as a "do now" bell-ringer, anticipatory set, closure activity, extra-credit assignment or as a main lesson in and of itself. By Scott Cianci.