Flipper Zero is a portable multi-tool for pentesters and geeks in a toy-like body. It loves hacking digital stuff, such as radio protocols, access control systems, hardware and more. It's fully open-source and customizable, so you can extend it in whatever way you like.
"Critical theory can be a vehicle through which we embrace the political nature of mathematics education while engaging students, especially those most vulnerable in the discipline, in mathematics. Critical theory has at its center the examination of power and privilege inherent in large systems such as the system of education."