Internal Sources for communication skill development:
External sources for communication skill development:
Apps:
Anki (fully customizable, vocabulary, grammar, sentences)
iKnow (vocabulary, grammar, sentences)
Memrise (vocabulary, grammar, sentences)
Quizlet (fully customizable, mainly vocabulary)
Lang8 (writing practice)
Duolingo (vocabulary)
Websites:
Social media sites:
Facebook, Twitter, Instagram, Vine, Pinterest
Grammar
Books:
Graded Readers (From Koeki Library, or Toda books)
English books at your level or below
Magazines/ Newspapers:
The Japan News (Yomiuri Shimbun)