Recently I formed a company to combine my 15 years of conducting flight workshops(kitemaking,bugs,birds,planes,womenin aviation)with the many years I have had in teaching students in class and in a home environment. What I have learned
time and again is that kids learn best when they are intrigued, when they have an opportunity to get involved directly with the learning process through hands-on acitivities, and when the element of mystery (and often humour)is added to lessons.
Some things are really obvious-
A recent question to your site was:
"How can I teach the difference between an adverb and
an adjective to a student?"

Get the kid to stand up and describe the colour of his shirt, pants, shoes. All colours are adjectives.
Ask him to take off his shoes and count his toes. All numbers are adjectives.
For Asian kids, "a an the" are not part of their common languages, so this is harder for them to get used to using. Explain that English is a newer language, not as ancient, so the concept of pictograph visualization is more remote to the Western way of verbalization- we're slower at understanding "wholistically" - so we need to focus on a zillion details ------thus, a rock, an apple,
the tree has to be said for English speaking people to understand the "pictures" being presented.