Based on your search query, I would recommend using Quizizz for your "four corners" question ideas. This platform allows you to create gamified quizzes and lessons that can be paced according to your or your students' preferences.
The AI-Enabled Quiz Generator feature can be particularly useful for your needs. It can automatically generate quizzes from existing documents or text, which can save you time and effort in creating your "four corners" questions.
Moreover, Quizizz provides access to millions of pre-made quizzes. You can customize these quizzes to suit your specific teaching needs, which can further assist you in generating "four corners" question ideas.
Lastly, the platform's detailed reports on student performance can help you assess the effectiveness of your "four corners" questions and make necessary adjustments for future lessons.
Remember, Quizizz offers a free basic version, but some advanced features and integrations require a paid plan.