This research and development study aimed to develop the prototype of virtual learning implemented in flipped classrooms and evaluate its effectiveness as a tool for developing Thai undergraduates' English receptive skills. To assess if the designed prototype is effective, a quasi-experimental method was employed. The experimental sample group…

Investigating lexical richness is a continuing concern within vocabulary studies. The present study aims to contribute to this growing area of research by exploring EFL learners' free active vocabulary by dividing them into groups based on their receptive vocabulary. It seeks to explain the role of different essay types and proficiency levels…

The importance of vocabulary, its types, selection criteria, size and depth, and teaching principles were found unclear. The present article seeks to respond to such challenge. To achieve the mentioned goals, we did a systematic review to previously related studies and theories. The results showed that the vocabulary was found to be more…