Acknowledgments

First of all, I would like to express my gratitude to all my students for their active participation in learning Khmer language. Their feedback on my courses helped me to develop and tailor this online textbook according to their needs and concerns.

I would like extend my heartfelt gratitude to the Department of Education of the US government for spearheading the international research and studies that paved the way for the creation of this book. The tireless efforts and commitment of the entire team involved in this project have significantly contributed to its success.

Special appreciation goes to Dr. Rajiv Ranjan, the primary investigator, and Dr. Siddharth Chandra, the co-primary investigator, whose leadership and dedication have been instrumental in guiding the project to fruition. They has provided invaluable insights and support, enhancing the overall quality of my work.

I would also like to express my sincere thanks to Linda Miles and her team from OER MSU Library, who served as co-primary investigators, bringing their expertise and passion to the project. Their collaborative spirit and contributions have been indispensable in shaping the content of this book.

This endeavor would not have been possible without the collective efforts and collaboration of everyone involved.

Finally, I express my gratitude to my family. This work is dedicated to three individuals who have consistently provided unwavering support: my father, my mother, and my wife.