ESL and the internationally adopted child

So, your child is going to school. Does he or she understand English? Language acquasition for fluency takes 5-7 years. There are dependant factors; how old the child is when introduced to the new language, are they becoming bilingual (maintaining first language take more effort and so new language aquasition takes longer), how old the child was upon starting to learn the new language, etc....
ELL departments are set up for kids who live in a bilingual world. There are different challenges for kids who do not. Here is an excellent article that addresses the ELL in school piece of the puzzle. http://www.adoptionarticlesdirectory.com/Article/Internationally-adopted-post-institutionalized-students-in-an-ESL-class/261