The Calculus Featured Question is designed to enhance conceptual understanding of topics in AP Calculus. While not routine, these questions will be useful in the classroom as enrichment activities. Students and teachers will have the opportunity to use technology on some parts of the question to gain insight into the underlying mathematics. Some questions will use standard techniques while others will introduce methods not typically seen in AP Calculus. We hope you find this feature interesting. We'd also like to know how you use these questions in your teaching -- please send your feedback to Ben Klein, the editor of the AP Calculus Featured Question collection and writer of the recent questions.