Links for German students of all levels

Useful online resources for German students- from beginner to advanced (A1-C2)
My German students have often asked me whether there are any online resources that I would recommend for self-study. Below you find a list of links and resources for all students of the German language.
Links for German students of all levels
http://www.dw.com/en/learn-german/s-2469 (various resources)
http://mein-deutschbuch.de (grammar)
https://quizlet.com (flash/index cards app)
https://www.memrise.com (vocabulary app)
https://www.duolingo.com/course/de/en/Learn-German-Online (vocabulary app)
https://www.olesentuition.co.uk/single-post/how-long-does-it-take-to-learn-german
Links for beginner German and lower intermediate German students
http://www.nachrichtenleicht.de (news in simple German)
https://learngerman.dw.com/en/beginners-with-prior-knowledge/c-36519797
https://www.olesentuition.co.uk/single-post/how-do-you-say-in-german
https://www.olesentuition.co.uk/single-post/separable-verbs-in-german-when-do-they-split
https://www.olesentuition.co.uk/single-post/learn-the-perfekt-tense-in-german
https://www.olesentuition.co.uk/single-post/der-die-das-explaining-the-cases-in-german
https://www.olesentuition.co.uk/german-language-blog/tags/german-word-order
http://www.schubert-verlag.de/aufgaben/uebungen_a1/a1_uebungen_index.htm
Links for intermediate to advanced German students
http://www.dw.com/en/learn-german/s-2469 (various resources)
https://www.olesentuition.co.uk/german-language-blog/tags/german-word-order
https://www.olesentuition.co.uk/single-post/how-to-master-verbs-with-prepositions-in-german
http://www.klett-sprachen.de/mittelpunkt-neu/r-1/180#reiter=titel&niveau=B1Plus (B1-C2 books)
http://www.daserste.de/unterhaltung/krimi/tatort/index.html (Germany's most popular crime series)
http://www.ardmediathek.de/tv/Tagesschau/Sendung?documentId=4326& (Germany's main news)
https://www.zdf.de/gesellschaft/markus-lanz (talk show)
http://www.zdf.de/ZDFmediathek/kanaluebersicht/aktuellste/509418#/kanaluebersicht/509418
https://www.zdf.de/dokumentation/37-grad (documentaries)
http://www1.wdr.de/radio/1live/on-air/sendungen/1live-domian/index.html (talk show)