This Clue-by-Clue mystery activity with an Agatha Christie twist helps students practice critical thinking skills. Solving a mystery means reading closely, evaluating information, revising opinions based on new information, synthesizing data from different sources, coming to a conclusion, and defending that opinion.And in this activity, students are given the clues one by one in manageable chunks. That helps them think deeply about each clue and practice their critical thinking skills. The Googl