My hypothesis is that the featural-visual indexicality and the sound-shape congruency properties of uniskript can make it a useful tool to teach methaphonological awareness to second language learners.
"The term metaphonological awareness is understood by the author as consisting of the explicit knowledge of selected aspects of L2 phonetics and phonology, analytic awareness of the formal properties of the target language as contrasted with the learners’ L1 as well as a considerable level of processing control, i.e. intentional focus on phonetic forms and articulatory gestures during speech performance. In a long-term empirical study Wrembel [11] demonstrated that meta-awareness raising and conscious acquisition of explicit knowledge contributes to the development of L2 pronunciation competence more than pronunciation instruction devoid of metacognitive reinforcement."  \cite{Wrembel_2010}
With the objective of illustrating the general concept of uniskript for the readers, I will introduce now the uniskript ESL alphabet. Using a one-to-one correspondence to represent the most salient phonological features of the Cot-Caught Merger dialect of American English, I will demonstrate how each one of the uniskript glyphs reflects featural-visual indexicality as well as sound-shape congruency. Uniskript ESL differs from the uniskript English alphabet used for vernacular literacy use in the way it treats the vowels.
The first distinction in the glyphs is between vowels and consonants. Vowels are generally represented by the use of lines, representing the free flowing of the air that characterizes its production. Consonants are represented by the use of a variety of plan geometric shapes, representing the organ where the occlusion occurs or the acoustic effect caused by the impediment to the air flow.