Online social networks 7 Data mining 3 Machine learning 3 Computer-assisted instruction 2 Data processing 2 Education, Higher 2 Internet in education 2 Language and languages 2 Natural language processing (Computer science) 2 Social media 2 Usage 2 User-generated content 2 Web-based instruction 2 Academic writing 1 Airlines 1 Anomaly detection (Computer security) 1 Computational linguistics 1 English language 1 History 1 Human-computer interaction 1 Internet 1 Management 1 Online social network 1 Political aspects 1 Press coverage 1 Public opinion 1 Reasoning 1 Revolutions 1 Sentiment analysis 1 Social aspects 1