This is the courses on https://cognitiveclass.ai/learn/spark/ website about Apache Spark
Spark Fundamentals I - https://cognitiveclass.ai/courses/what-is-spark/
Spark Fundamentals II - https://cognitiveclass.ai/courses/spark-rdd/
Spark MLlib - https://cognitiveclass.ai/courses/spark-mllib/
Exploring Spark’s GraphX - https://cognitiveclass.ai/courses/spark-graphx/
Analyzing Big Data in R using Apache Spark - https://cognitiveclass.ai/courses/analyzing-big-data-r-using-apache-spark/