Javascript Basics course, through Lesson 1

I started into the Javascript basics course, and though I've only finished the first two lessons (Lesson 0 and Lesson 1, interestingly enough), I am not finding this class as polished as the others. My major concern, though, is the fact that I don't feel like I am learning what I need to learn during the explanation portion of the lesson.

I am used to classes that show you exactly what you need to know, and then let you practice that in the followup questions or quizzes. In this class, I feel that I am given a generic idea of what I need to learn, and the detail that I am supposed to learn comes in the quiz answers, afterward.

It may be intended that what we are supposed to learn is essentially pushed to the student's side, but it leaves myself (and several other students, from what I read on Piazza) with a lot of confusion and doubt that we are learning appropriately.

I had posted the following on the Piazza site, but for the sake of illustration, I have added it here:

For example, String Manipulation Quiz 1 gives a task of changing a string, and even gives a hint to use slice() in the instructor's notes. Why wasn't slice, or other string manipulators, presented in the lesson for students to understand? The "explain the details" approach was used in the Intro to CS class, so that students understood exactly what they were expected to use, and how to use it. For some reason, that approach is not used here. I don't know if that is by design, or just how it came out.

I found myself clicking on the box to get past the quiz, and learning more from the answer presentation than trying to use the information given before the quiz and hashing through it on my own.

I don't like being critical of the instructors, as I am sure they are putting a lot of work into these classes and presentations for us. Both instructors have been entertaining, and they do know their stuff. I just wish the presentation was more detailed, with more time spent on explaining exactly what the instructors expect you to know, and less on relying on the student to fill in the gaps.