"Would You Like A Synonym With That" Synonym Word Wall- This display would be a great way to get students to expand their vocabulary by visually seeing the different words they can use or by adding more synonyms to the wall.
Students select two unfamiliar and interesting words from their own reading. After becoming "expert" or "master" of these words students design a card which provides a series of clues so that a partner (who does not know the secret words) can guess the words.
B's Book Love|How and Why to Use Word Walls with Older Students|This blog post contains excellent ideas for using word walls with older students. The author does a different activity each day, Monday-Friday, to help the new vocabulary students are learning stick in their memory and be more meaningful. Since her activities only cover 5 new words per week, they could be especially well-suited to use with ELLs, who should not be overwhelmed with lots of new vocabulary in a short period of time.
This board helps my students remember some of the word parts we have highlighted throughout the year. Greek and Latin word parts are the toughest (we put those in the root section), but once they master them, they can continuously add examples (leaves) throughout the year seeing their vocabulary and the tree get thicker and thicker!