Add new Substrate lessons

Lessons/English/L_EARN/Contributing/LCon1:Contributing.md

@@ -1,7 +1,9 @@
-# Contributing to BDU L-EARN
-This lesson provides all of the information you need to know in order to contribute to BDU L-EARN.
+# Contributing to Polkadot L-EARN
+This lesson provides the information you need to know, to contribute to BDU L-EARN.
 
-All of our lessons are organized on Github using a markdown (.md) format. These tools must be learnt first before contributing.
+All our lessons are organized on Github in markdown (.md) format. These tools must be learnt first before contributing.
+
+Reward: .2 DOT
 
 ## Theory
 

Lessons/English/L_EARN/L1:Getting_Started_With_Polkadot_L-EARN.md

@@ -0,0 +1,88 @@
+# Getting Started With Polkadot L-EARN
+
+Welcome! This lesson provides instructions on learning and earning with Polkadot L-EARN.
+
+We are a Polkadot community project where you can learn about Polkadot and Earn DOT at the same time. Learning is peer to peer, and open source. Our goal is to train people with Polkadot skills, provide you with DOT income, and increase Polkadot adoption!
+
+Read this lesson, take notes, and talk to a testing official at the end. You can earn 0.1 DOT at the end.
+
+## Theory
+Study this section to understand what Polkadot L-EARN is all about
+
+### Learning
+Learning about Polkadot is Polkadot L-EARN's primary focus. In this section you will learn what topics we offer, how lessons are structured, and about learning trees and learning paths.
+
+#### Topics
+
+We offer a small core of general lessons for beginners, and an expanded set of lessons for developers.
+
+There are also a small number of lessons involving the Polkadot L-EARN platform itself, including this lesson.
+
+#### Open Source
+All lessons are open source and available in this Github repository and free for anyone.
+
+#### Peer to Peer
+We use peer to peer learning and teaching, and even testing.
+
+Community members can become testers after going through an approval process
+
+### Earning
+Earning DOT is the second aspect of Polkadot L-EARN. In this section you will learn how to Earn DOT.
+
+#### Passing Tests
+Every lesson comes with a test. For this lesson, the test will just be a few yes/no questions confirming you understood the key points.
+
+You can take as many tests as you want to accumulate rewards.  
+
+Rewards are always in DOT!
+
+#### Withdrawing
+After accumulating DOT earnings, you must withdraw them to get it into your personal wallet.
+
+Read carefully below to understand what conditions must be satisfied before withdrawing.
+
+#### Verification
+Verification is required to prevent Sybil attacks, that is individuals claiming multiple identities and multiple rewards.  
+
+There are 2 ways to get verified on Polkadot L-EARN.
+ - [get verified on BrightID](https://brightid.gitbook.io/brightid/getting-verified)
+ - Get verified directly with a trusted community member.
+
+You may accumulate earnings before verifying, but verification is required to withdraw rewards.
+
+We try to make it as easy as possible to get verified, while remaining resistant to sybil attacks.
+
+#### Minimum DOT Balance
+The Polkadot Network does not allow balances less than 1 DOT. This is intended to reduce blockchain size and prevent spam.
+
+In order to withdraw your DOT earnings, you must have at least 1 DOT in your wallet. If you cannot get 1 DOT, then you must accumulate 1 DOT in earnings before withdrawing.
+
+## Practice
+Follow these steps to complete the lesson.
+
+### Join Community
+First things first, please join our community channels! We have English and Spanish Telegram Channels
+
+* [English](https://t.me/polkadotlearn).
+* [Spanish](https://t.me/PolkadotAprendeAGanar)
+
+### Introduce yourself
+Introduce yourself in the telegram channels
+
+### Study This Lesson
+Self explanatory
+
+### Get Verified
+Get verified on brightID. https://brightid.gitbook.io/brightid/getting-verified
+
+### Schedule a Test
+To schedule a test simply ask in our telegram group.
+
+Testing at the moment is done manually in our Telegram groups. A tester will have a conversation with you, ask you questions, and ask you to complete exercises to prove you have learned the material.
+
+In this case the test will simply be a few yes/no questions
+
+## Take the test
+Pass the test and earn DOT!
+
+If you have any questions or doubts, just refer to the instructions above or ask for help in the community channels.

Lessons/English/L_EARN/CryptoCurrencies/Polkadot/LCP1:Intro_To_Polkadot.md → Lessons/English/L_EARN/Polkadot/LP1:What_Is_Polkadot.md

@@ -50,7 +50,7 @@ The Relay Chain's core functionality includes:
 * Preserve historical Data
 * Monitor health of the entire Polkadot ecosystem.
 
-Users who stake DOT can validate transactions if they are nominated through the relay chain.
+Users who stake DOT can validate transactions if they are nominated by the relay chain.
 
 #### Parachains
 
@@ -141,6 +141,12 @@ Smart Contracts allowed customizing and programming what can be achieved on a bl
 
 Polkadot aims to have a secure transaction validation mechanism, that at the same time does not require expensive hardware and excessive energy consumption.  
 
+## Videos
+
+Now that you have read about polkadot, here is a [video](https://youtu.be/_-k0xkooSlA) combining all the above points in brief for revision.
+
+This is a longer [video](https://youtu.be/kw8eu2VadFA) covering various topics starting from History of the internet, what is blockchain to what is Polkadot and finally what problems is it solving.
+
 ## Practice
 
 ### Set up a Polkadot Wallet