Language Training Institute (LTi) was the first organization in Australia to Accredited a Certificate IV in TESOL.

LTi has subsequently become the first Australian organization to publish and distribute a suite of TESOL Teacher Training Texts and Workbooks for TESOL Teacher Trainers and Trainees that correlate exactly to an accredited Certificate IV in TESOL Course.

The LTi TESOL publications include all the theory assessment tasks required for completion of the 12 Core Units and the 11 Elective Units of the Course. In addition, the Study and Practice Teaching Guide provides detailed requirements for completion of the comprehensive Practice Teaching component and includes a range of forms used for reporting on and observation of the Trainee's Practice Teaching experience. LTi has also produced a Trainer's Guide and Workbook Answers. All publications are written for adaption to both face to face classroom delivery and distance education, or "blended learning" mode.

An estimated 3,000 students have been trained by LTi or organizations using the LTi TESOL Course or TESOL Course publications around Australia and overseas in China, Korea, Malaysia and Singapore. This has included both native and non-native speakers of English.