I am not going to waste time on Selenium IDE and Selenium RC which are outdated now.

I will concentrate on the best industry standards and more on practice 

I will teach you on the following concepts

Selenium WebDriver

Working with different browsers

Locators

WebElement methods

Select class for drop-down

Alert

Frame

Windows

Actions

Java

Oops concepts

Reusable Classes

Writing classes and methods

Conditions and loops

How to build logic?

How to organise folders?

Reading and Writing text, CSV, properties and Excel files

Exception handling

Reporting

Custom reports

Extent reports

ReportNG Reporting

TestNG

What are Annotations?

Levels in TestNG

How and when to use Annotations?

Data provider

@Test parameters

TestNG XML

Execution from cmd prompt

Grid

Explain Grid and where to use?

Configure Hub and nodes

Actual capabilities and desired capabilities

Executing in Grid

Framework

Data-driven framework

Keyword driven framework

Page Object Model

Selenium automation can be done on different browsers, and I will explain about my way to work on challenges and mitigation of them

I have been working with varying libraries like 

text to work with PDF files

JDBC to work with Oracle DB

J2SSH to work with remote servers

Robot class from java.awt 

Looking forward to Transfer my knowledge to more people