Because you are in this class I believe you learned your times tables in the 2nd through 4th grades and found work with fractions and then factoring easy.   Those students who did not, often found fractions and factoring more challenging, used a calculator, and stopped taking math courses.

    Today is is your task to learn basic derivatives like times tables -- by memory, without use of cheat sheets and calculators or web pages, so that you can mentally do more challenging, complicated, derivatives which follow. Yes, calculators and cheat sheets are still available to you but see if you can ween yourself of their use.

    Happy studying.

                        Stay safe, A²