Inside the zip folder, there are 3 folders that consist of 3 courses of this specialization 
Course 1 : Supervised Machine Learning: Regression and Classification
Course 2 : Advanced Learning Algorithms
Course 3 : Unsupervised Learning, Recommenders, Reinforcement Learning
The file contains, ipynb (jupyter notebook ducuments) which have practice labs and challenge labs on various topics relevant to course.
There are also screenshot to quizzes.