“…There are also published papers about text mining that aimed at classifying educational texts [Webber, Cristofoli and Lima 2013], or classify student's messages [Bovo et al 2013, Raghavan et al 2010, clustering and monitoring discussion forums [Oliveira Júnior et al 2011, Oliveira Júnior andEsmin 2012], enhancing feedbacks in written works [Villalón, Kearney, Calvo and Reimann 2008], and helping to predict students' performance [Romero et al 2013], among others. Nevertheless, they do not provide recommendations or any other kind of help regarding students' grammatical mistakes.…”