Before you start randomly plugging stuff into formulas, it's a good idea to know which problems you should be using the formulas for! So this video lays out the trademark signs of a Poisson problem, so you don't just think of it as the "other" binomial probability theorem.
How To Tell Difference Between Poisson vs Binomial Problems
These two types of problems are always taught in the same chapter, so they can get confusing for that reason, but this video explains lays out exactly how to know which formula to use on which problem.
The Rules For Poisson Distributions
This video quickly lays out the "mathy" technicalities of when you are allowed to use Poisson formula to solve word problems that look like they should be Poisson problems. Do you really need to know these? Probably not. Will they be on a multiple choice test? Maybe.
Calculating Probability Using Poisson Distribution
Now that we laid the groundwork for Poisson problems in the previous videos, it's time to actually solve a few problems! Whenever you've got a problem involving the number of times something will happen over an hour or a week or any other period of time, Poisson is the formula for you.
Standard Deviation & Variance of Poisson Distribution
This video just covers the basic formulas you have to use to calculate the variance and standard deviation for a Poisson distribution.
Usual vs Unusual Events for Poisson Distributions
This video covers a very specific type or problem that is used by every book and prof: determining whether a number of events is "unusual" -- either high or low -- using the Range Rule of Thumb.
If you do not have an account, you should get one, because it is awesome! You can save a playlist for each test or each chapter, and save your "greatest hits" into a "watch right before the final" list (not that we recommend cramming, but when in Rome...)