I do not teach elementary school, so I do not review the effectiveness of this book as a teaching tool. It is a terrible and ineffective graphic novel.
The problems are many. Tiny panels make even close-ups unengaging. Too many characters look alike and dress alike, so it can be difficult to distinguish who is speaking. The colors are muddy. Most panels have dialogue balloons and captions paraphrasing the dialogue, which become boring. Many captions are misplaced, and should be at the top of a panel, while others should be on the bottom, so story details are frequently told out of order. The artist has no skill in pace or building tension, so there is none. Most panels are drawn from the same angle, the reader's perspective being at about the collar-bone. This makes for a visual sameness that defeats good storytelling.
On the plus side, most of the glosses are pretty good. I did not notice another plus side. Avoid this stinker.