English for Integrated Studies (EIS) is a new model of bilingual education first introduced in the Kingdom of Thailand. In 2004, the EIS project Thai teachers instruct their classes (Science, Mathematics, Computer and English: STEM) using English as a medium of instruction (EMI) with STEM English multi-media. The low amounts of tuition fees paid by students' parents are used to train the Thai teachers and STEM English textbooks to use English as a medium of instruction. Then Teachers improve their communicative English and Teaching technique skills by on-the-job training (OJT) from their instruction and students improve their English language skills in the new created English environment.EIS learning approach is based on a mix of applying the educationist Bruner, psychologist Vygotsky, bil