Add details about Coursera and Extension School

Author: adpi2

online-courses.md

@@ -7,16 +7,39 @@ redirect_from:
   - /learn
 ---
 
-## Try Scala in your browser!
+## Scala courses on Coursera by EPFL
 
-There are a handful of websites where you can interactively run Scala code in your browser! Have a look at [Scastie](https://scastie.scala-lang.org/).
+The [Scala Center](https://scala.epfl.ch) at EPFL offers free online courses of various levels, from beginner to advanced.
+
+For beginners:
+
+- [Effective Programming in Scala](https://www.coursera.org/learn/effective-scala): a practical introduction to Scala for professional developers
+- [Functional Programming Principles in Scala](https://www.coursera.org/learn/scala-functional-programming): the foundational course by Martin Odersky, Scala's creator
+
+More advanced topics:
+
+- [Functional Program Design in Scala](https://www.coursera.org/learn/scala-functional-program-design): builds on functional principles with more advanced concepts
+- [Parallel Programming](https://www.coursera.org/learn/scala-parallel-programming)
+- [Big Data Analysis with Scala and Spark](https://www.coursera.org/learn/scala-spark-big-data)
+- [Programming Reactive Systems](https://www.coursera.org/learn/scala-akka-reactive): introduces Akka, actors and reactive streams
+
+All courses are free to audit, with an option to pay for a certificate, to showcase your skills on your resume or LinkedIn.
+For more on Scala Center's online courses, visit [this page](https://docs.scala-lang.org/online-courses.html#learning-platforms).
 
-## Online courses from the Scala Center
+## EPFL Extension School: Effective programming in Scala
 
-The [Scala Center](https://scala.epfl.ch) is committed to creating high-quality 
-and freely available online courses for learning Scala and functional 
-programming. The course levels range from beginner to advanced.
-More details on [this page]({% link scalacenter-courses.md %}).
+Subscribing to [Effective programming in Scala](https://www.epfl.ch/education/continuing-education/effective-programming-in-scala/) on the EPFL Extension School offers:
+
+- Regular Q&A sessions and code reviews with experts from the Scala team
+- An [Extension School certificate](https://www.epfl.ch/education/continuing-education/certifications/) upon completion
+
+This course combines video lessons, written content and hands-on exercise focused on practical aspects, including business domain modeling, error handling, data manipulation, and task parallelization.
+
+For more on Scala Center's online courses, visit [this page](https://docs.scala-lang.org/online-courses.html#learning-platforms).
+
+## Try Scala in your browser!
+
+There are a handful of websites where you can interactively run Scala code in your browser! Have a look at [Scastie](https://scastie.scala-lang.org/).
 
 ## Scala Exercises