https://www.coursera.org/learn/machine-learning
Free tutorial course provided by Dr. Andrew Ng, Co-founder of Coursera. If you end this course, You can now code OCR by yourself.
http://cs231n.stanford.edu/ https://archive.org/details/cs231n-CNNs
Free lecture provided by University of Stanford.
https://www.youtube.com/watch?v=2pWv7GOvuf0
David Silver, lead programmer at DeepMind give us a lecture.
https://medium.com/towards-data-science/the-mathematics-of-machine-learning-894f046c568
list of basic mathematics required for ML
https://karpathy.github.io/neuralnets/ https://github.com/rasbt/python-machine-learning-book https://swalloow.github.io/pyml-intro1
https://www.reddit.com/r/MachineLearning/comments/6jgdva/d_machine_learning_wayr_what_are_you_reading_week/ https://www.reddit.com/r/MachineLearning/
Yes, It's Reddit. But It has many helpful articles though.