Regarding teaching implications, it is undeniable that input is necessary for
L2 learning. However, it seems that positive unmodified input may have some limitations
to help learners automatically acquire the target language features, especially in
a natural language learning setting. The fact that the post-test scores of the learners
in the control group, who received neither input modifications in the form of textual
enhancement nor consciousness-raising remark, in this study were significantly than
the pretest score and were not significantly different from those of the learners in the
experimental groups is probably not sufficient to reject the potential impact of input
enhancement and consciousness-raising. This improvement may be due to the fact that
the teaching session in this study was conducted in a classroom setting. In Thailand,
an English language classroom usually apply a structure-based teaching approach,
with which Thai students are familiar and where they expect to learn language forms
(Lightbown & Spada, 2006).For this reason, they may tend to notice the language
features presented in the input though it is not enhanced. Besides, the target features
were presented in isolated sentences, and this should make it easier for the students to
notice. In other classroom situations, for example, where communication is emphasized
or where the target features are presented in a less salient way such as in a reading
passage, some forms of input enhancement probably together with consciousness
raising should assist the learners to learn the target language features better.