Reason and Wonder is great resource for engaging lessons. Each lesson starts with an interesting image. Students are asked what they notice about the image and what they wonder about the image. Michael Fenton, writes the lessons in such a way as to promote student curiosity and the tasks are inherently interesting.
These follow a 3-act set up in which the teacher allows students to generate questions about the topic. The question to be explored is predetermined, but students will likely ask the desired question if they are encouraged to ask as many questions as they can.
The thing I like best about Michael's lessons is that they are classroom ready. Many of the other 3-act lesson collections are great too, but these are very complete with lots of media files, desmos files, and presentation slides.
I have only tried the Charge! lesson in my classroom so far, but I look forward to exploring more of Michael's lessons.