You want to make sure youre not wasting your time and money on something thats not going to teach you what you need, or is poorly designed at doing so. 어떤 교육 프로그램이라도 본인이나 다른 사람을 비교적 쉽게 교육할 수 있어야 합니다. If it fails to do this, then that program is flawed somewhere.