This puzzle covers the major biomes as well as various kinds of each. Crossword puzzles are excellent teaching aids. They can be used to introduce a study of biomes or to provide review of basic facts before testing. In my crossword puzzles I frequently include antonyms, synonyms and homonyms and other incidental clues that aid in vocabulary growth. They reinforce correct meaning and spelling of subject vocabulary terms. They are self-correcting to a certain extent and require little teacher input.
When working with remedial levels, allow students to work in pairs, to use the word list as a reference, or give them 2-3 free answers before they begin. For enrichment or above average levels, do not allow the use of the word list. Average students could be given a partial word list to work from. (Simply copy only one half of the enclosed list or black out every other word.)