Specifically, students who want to do well in English should lay off the smart phones (or at least be mindful of punctuation when using them to communicate). A recent study shows that texting has a negative impact on grammar skills.
Northwestern Doctoral Candidate Drew Cingel surveyed 228 middle school students in Pennsylvania about the number of texts they sent and received, their attitudes about texting and other activities they engaged in, such as reading or watching television.
They were then given a 22-question grammar quiz. The material included verb/noun agreement, use of correct tense, homophones, possessives, apostrophes, comma usage, punctuation, and capitalization. The results showed that the more often students sent text messages using shortened words and symbols, the lower their scores on the quiz.