Machine Learning Fast Track

These online articles a great hands-on introduction to the Machine Learning principles, including the Mathematics background and theoretical principles. You can even follow along, getting started with Python to see ML at work.
Mathematics for Data Science
Basic Linear Algebra for Deep Learning
Linear Algebra for Deep Learning (includes some Python)
Developing in Python
Quick dive into Pandas for Data Science
The Four Pillars of OOP in Python 3 for Beginners
Machine Learning
Few Machine Learning Problems (with Python implementation)
Machine Learning in Python - Part 1
Machine Learning in Python - Part 2
Unsupervised Learning in Python
ML Libraries
Time Series Analysis in Python (using Facebook Prophet)
Great Visualization for Neural Networks
Miscellaneous Applications
K-nearest-neighbors - AirBnB Pricing
Advanced Structures