The main purpose of this study is to discover the instructional supervision and pedagogical practices as major strategies used by teachers who are currently teaching in the elementary schools. This study will focus on the commitment of the teachers to teaching elementary students and how they boost perseverance in achieving their goals in teaching English. The decreasing number of students and increasing accountability to the public challenge in the Philippines is the sustainable development of schools. Schools must provide quality education to attract students and maintain their brand. For sustainable development, leaders are expected to strengthen the professional competency of teachers and staff, formulate strategic plans, and build collaborative relationships with external parties to manage change. Principals, as instructional leaders, are primarily responsible for promoting effective teaching implementation. Effective principals continually engage teachers in instructional dialog and reflective practices to ensure that they are thoroughly equipped to improve student performance. Effective principals are aware of the varied instructional strategies that directly or indirectly improve teachers professional development. When teachers are not well supervised, effectiveness in instruction will be adversely affected and the instructional purposes may not be well realized. Negligence in the improvement of instruction through improper instructional supervisory practices by school heads may go on without being detected. This may lead to low quality of instruction and invariably teachers lack of commitment to their job.