Since I have not started my ESL teaching yet, I am doing tons of research and thinking about it. It strikes me that having a zillion pictures in your tool kit is a "given". I have used both flashcard-style picture decks and books with pages of pictures divided into various topics or locations.
Tell me your experience, or what works for you when trying to build English vocabulary.
I realize that saying a word and showing what the word looks like may not help when the individual has no idea what it is. The picture, of course, will increase the chances of keeping the word in memory.