This course is a beginner's gateway into the mechanics of using Redux as an application building platform. It takes a bottom-up approach, enforcing the basic aspects of Redux before incorporating them together in a creative and interactive way. It begins with a short theoretical section before moving on to application based problems. 
The course does assume that the user has a basic idea of how React works, as Redux works in the React environment. Let's dive in!

Understanding Redux: A Beginner's Guide To State Management

Back to the bank analogy.

When you go to the bank to make a withdrawal, you meet with the Cashier. After you make your WITHDRAW_MONEY intent/action known to the Cashier, they do NOT just hand you the requested money.

No. 

The Cashier first confirms that you have enough money in your account to perform the withdrawal transaction you seek.

The role of the reducer is to help us access the store.

Getting to know Redux (Theory)

Your First Redux Application

Understanding State Updates with Actions

Building Skypey: A More Advanced Example

Building Skypey: Designing the State Object

Building Skypey: The User Component

Building Skypey: The Empty Screen

Building Skypey: The Chat Window

Building Skypey: Header and Chat Window

Building Skypey: Messaging

The Skypey App

The Store and Reducer Relationship