A comprehensive online resource website

ESL Monkeys: ESL Online Resources
This site provides quite a great deal of resources for teachers, schools, and students. One interesting tool of this site is that if you double click and one more click on any word, which is not linked, on a page with the "Double Click a Word!" sign  on the top, then, it directs you to the word's definition on an online dictionary. I find the following three sections most useful:

1. Free ESL Teaching Materials: ESL teachers can search lesson plans according to topic, skill, level (elementary, intermediate, advanced, and business), age (chlidren, teens, and adults), and keyword. In the "Reading Materials" section, they provide up-to-date news articles, short, long, and classic English stories, along with tips on teaching reading skills.

2. Free Resources for ESL Learners: this section provides useful resources such as free lessons and free downloadable books for ESL learners. Especially, I like "Word, Idiom, and Quote of the Day."

3. Admissions Essay Guide and Samples: this section provides useful tips and guidelines for writing application essays along with essay samples.