Based on your query, I recommend using Quizizz and Whimsical to effectively teach existential philosophy.

Quizizz can be a great tool for creating interactive quizzes on existential philosophy. Its AI-Enabled Quiz Generator can automatically generate quizzes from your existing documents or text on existential philosophy. This feature can save you time and ensure that your quizzes are comprehensive and aligned with your teaching materials. Additionally, Quizizz offers Pre-made Quizzes that you can customize to suit your teaching needs. This can be particularly useful if you're looking for inspiration or want to incorporate different perspectives into your lessons.

On the other hand, Whimsical can be used to visually represent complex existential philosophy concepts. Its Boards feature allows you to create diagrams and mind maps, which can help students understand and remember these concepts better. The AI-powered suggestions for Mind Maps can also aid in generating new ideas during brainstorming sessions, which can be particularly useful when discussing existential philosophy, a subject that encourages deep thinking and exploration of different ideas.

In combination, Quizizz and Whimsical can provide a comprehensive and engaging learning experience for your students.