This is a great article. I have been teaching this way now for about 10 years and it works well.
For anyone who does not read Spanish the commenter Eugenia wrote
"I believe we must include a lot more information such as how to help students learn how to speak English quicker."
At least for Spanish speakers there are many cognates. I am currently working with children who speak a language that has no cognates with English. Additionally my private school requires the students to learn 3 new languages simultaneously. It is too many languages at once and the results are poor.