Online learning classes for cloud vendors

some options for online learning the three leading cloud providers.

EdX Classes - Open Source and free online MOOCs 

Azure: https://www.edx.org/learn/azure
AWS:  https://www.edx.org/learn/amazon-web-services-aws

Amazon Web Services(AWS) classes and resources:
https://aws.amazon.com/training/course-descriptions/
- Free online classes
https://www.aws.training/LearningLibrary
- free more focused learning options

Google Cloud Platform (GCP) classes and resources:
https://cloud.google.com/training/free-labs/
- GCP labs to learn
https://cloud.google.com/docs/compare/aws/
- To help those who know AWS to use GCP
https://cloud.google.com/docs/compare/azure/
- To help those who know Azure to use GCP

Microsoft classes and resources for Azure:
https://docs.microsoft.com/en-us/learn/azure/
- Azure learning portal

Template Workshops for learning and practice:
   - These resources contain examples and workshops to learn and practice skills.
   AWS 
     https://github.com/aws-samples
     https://github.com/awslabs
  Azure
     https://github.com/AzureWorkshops
  GCP
     https://github.com/GoogleCloudPlatform
  Terraform
     https://github.com/hashicorp/workshop-puzzles

Commonly Referenced Docs:

UW Madison Public Cloud Team Events
Online Learning Classes for Cloud Vendors
What Data Elements are allowed in the Public Cloud