QIS: Automated Refactoring for Scratch

Recent studies have demonstrated that the code quality of Scratch projects impacts this learning environment's educational effectiveness. For example, novice programmers are less willing to remix and continue modifying those projects whose code quality is low. This showpiece demonstrates QIS (pronounced as /che̅z/), a novice-friendly refactoring tool for Scratch 3.0. Integrated with the latest Scratch environment, QIS analyzes on-the-fly the code quality of an edited project, displaying the refactorable quality problems as actionable improvement hints. Programmers can then decide to act by carrying out the suggested refactoring to improve the quality of the project's code. QIS not only empowers novice programmers to easily and effectively improve their code, but also educates them about the benefits and importance of code quality and its improvement practices.