Self-marking Interactive Excel Worksheets for Teaching | Titration Example

An interactive "smart" worksheet, built within a... well, within a spreadsheet. Because of course it is. But it does provide some flexibility over online quizzes that don't allow students to upload their own data. They can also be cheaper and more tailored to a situation than more complex online solutions, requiring relatively little coding experience to make (just spite + belligerence).
I'm not going into too much detail about every single part of this, as it would take an hour. But it's showing off the basic ideas and the harder parts. Once you've got that far, the rest is just imagination.
Apparently this was titled "self-marketing" for ages. In my defence, I'm an idiot.