> He asked them which parts of speech should be taught first which the consultants didn't have an answer so they implemented A/B testing to see which order of w

> He asked them which parts of speech should be taught first which the consultants didn't have an answer so they implemented A/B testing to see which order of words and concepts people learned fastest with. Here's a crazy thought: People are different, and different people will have different best ways of learning a foreign language, depending on what they know beforehand, and how they like to learn. Some people are having great success with duolingo, good for them. I'm not one of them, I think its structure sucks for me, I need way more grammar and structure rules, not an endless string of random sentences. And the thing is, duolingo could add what I wanted to their lessons. They could absolutely add lists of pronouns or prepositions, or several sentences with small variations to their repertoire.