The eGlossary is part of the Moving into English series by Harcourt School Publishers.
It is an important piece of instructional material especially for beginners who need to learn the most important words at their own level. You can choose the level (from 1st to 5th grade) and then you choose a letter to start your search. Finally, you see a picture with the meaning and two sentences to clarify the comprehension.
You get the meaning, the phonetics and the word in context, from basic vocabulary to more difficult one. If you are a teacher this is a good resource to explore your students' autonomy inside and outside te classroom.