Have you ever used keyword method(mnemonics) with ur students? It is such a great method for students to memorize foreign language vocabulary. I used the method with my Thai students and it assisted me so much. However, it is time consuming for creating the tools. I had to draw a picture and think about the linkage sound and sentence. For example, the word butterfly, the keyword is ' but ' the similar sound to Thai (L1) which means card. I then I draw a butterfly perching on the card. Students will remember the word by the linkage sound and the picture. Finally, they will figure out the word by recalling the linkage sound and the picture. Anyway, it will be greater if they can generate their picture themselves.
Anyone who had used this method can share the idea with me, especially any Thai teachers who teach EFL. We may a team of creating the method as the innovative tools to promote our Thai students in learning English as a foreign language.