The prime purpose of this study was to explore a correlation<br />between bilingual instruction in an ESL class and the class<br />performance of the ESL learners at the secondary level. Quantitative<br />research method was used to evaluate the test performance of 60 ESL<br />learners divided into two groups: One was the controlled group (which<br />was given instructions in L2 only) and the other was the treatment<br />group (which was given instructions in both L1 and L2) in Public<br />School settings. Apart from the students, 15 language teachers’ feedback<br />upon their perceptions of L1 usage in L2 classrooms was taken<br />by using the Likert scale feedback forms. The results confirmed that<br />the instructions given bilingually are directly associated to improved<br />learner outcomes and teachers’ responses for the usage of L1 in<br />classrooms showed a strong positive response.