A "learning juice" is an alcoholic drink you have before a certain class used to enlarge your confidence in your abilities and therefore lets you contribute more to class. Its secondary purpose is to make the class more bearable.

You live through the experience and learn the mistakes.

Advice given or efforts made for a person to better communicate with people who primarily speak Spanish. Allows improved communication with co-workers, customers, employees or anybody you meet who mainly speaks Spanish.

the rate of a person's progress in gaining experience or new skills.

a dumb thing that schools do during quarantine to piss their students off

A terrible site for troubled youth trying to learn chemistry or any other science of such kind. Every wrong attempt will cost your grade to decrease by 10%, just so you can watch your perfect grade go down because you didn't simplify the balanced equation. All in all, you just have zero idea what they want of you. Also, the correct message appears in red. Blood red.

Generally defines the amount of effort and/or time someone is willing to invest in learning something new.

A "steep learning curve" means more effort and/or time was required than they were willing to invest.