The Effect of English Central on Students Ability

This study investigated the progression of oral precision among eighth-grade learners at
SMP Negeri 17 Medan, focusing on lexical selection and articulation through the
utilization of the EnglishCentral platform. A quantitative pre-experimental design was
employed, utilizing a speaking assessment administered in three stages: initial evaluation,
instructional intervention, and final evaluation. The population consisted of all eighthgrade
students, from which two groups were selected via cluster random sampling: a
control group comprising 26 learners and an experimental group comprising 30 learners.
Participants were instructed to deliver spoken responses lasting two to three minutes,
involving the presentation of straightforward topics along with the articulation of personal
viewpoints supported by justifications and counterarguments. The findings revealed a
notable impact of the EnglishCentral platform on the precision of learners’ spoken
language. In the experimental group, the mean score for lexical accuracy rose from 66.77
during the initial assessment to 73.77 in the final assessment, while the mean score for
articulatory accuracy increased from 65.87 to 73.93. Results from the Paired Samples
Test indicated a two-tailed significance value below 0.001, accompanied by a mean
difference of -6.18, both of which fall below the 0.05 threshold, thereby confirming a
statistically meaningful enhancement. These outcomes suggest that integrating the
EnglishCentral platform into instruction yields measurable gains in the precision of both
vocabulary use and pronunciation, particularly within the context of expressing and
exchanging opinions.