Groups have a maximum of 12 students to facilitate teaching.

This program is taught by teachers who are ESL, CELTA, DELTA, TEFL, or TESOL certified and by teachers who are licensed to teach at an elementary or secondary level in the United States, Canada, UK or Australia.

Instituto Heslington provides the basic curriculum and lesson plans to teach the fundamentals of the English language. Volunteers have the freedom to integrate activities, games and anything they think will help their students learn and develop. No Spanish is required to volunteer. Authentic Mexican food is extremely delicious and healthy and volunteers will enjoy amazing culinary treats as they enjoy the local cuisine.