Quizlet/Kahoot/Gimkit: On many of the teacher's websites you will find links to curriculum based Quizlet and/or Kahoot activities. You can also search topics on Quizlet.com, Gimkit.com & kahoot.com
Duolingo: free app and Web site
Online Dictionaries: MDBG , Yellow Bridge , Line Chinese, Written Chinese
Mandarin Learning Apps: Hello Chinese, Chinese Writer, Pleco Chinese Dictionary, Pinyin Trainer