Hi I'm prof. Bills, and I spent 10 years studying how to utilize calculators to their fullest potential. I have owned and studied them all. My calculator lot consist of 2,000 calculators. After school I have taught classes on how to cheat and utilize calculators to their full potential. I tell everyone that if you teacher gives you a tool, then you should know how to use it! In my very first YouTube video I have provided a brief overview of 1/10 of my collection and what are the calculators that I recommend you should own.

https://www.youtube.com/watch?v=4Fnem9x_NZM

scientific: Casio Super FX Plus

Graphing: TI-84 color

Advanced: HP prime

https://www.youtube.com/watch?v=4Fnem9x_NZM

scientific: Casio Super FX Plus

Graphing: TI-84 color

Advanced: HP prime