If you are planning to generate some vocabulary lists for your students, even those who are very young, take a Toefl book and randomly choose words that you know feature in the test. This way the students get used to words that will help them at a later date. Learning instructions, test question forms and academic words are all important aspects of language and can be taught instead of words that may not be particularly helpful for students.
All vocabulary is important, of course, but this is a suggestion that makes sense in the building of students' development.
Hello fellow teachers,