MEP is more teacher-intensive, but if you have a struggling math learner, you are probably spending a fair amount of time with him or her already. Other than printing out the lesson plans and practice pages (and briefly looking through them), there’s not a lot of advance prep once you get used to it, and you can still keep the lessons short. Sometimes we spent more than just one day on a lesson. But you do have to do most of the lesson along with the child.
There are online interactive tutorials/practice pages for years 7 & 8, and my daughter mostly went through the lessons on her own, only asking for my input when she wasn’t quite getting something. With the younger grades, though, you have to do the activities with the child. It did cement the concepts nicely for my daughter who was going through year 3, but it did take up my time every day. It wasn’t too often that she did a lot of independent work.
I have to say that my younger daughter got rather bored with it. For some reason, she either loved the puzzles they occasionally threw in or she found them frustrating. We decided to switch to MUS so we wouldn’t kill her love of math, so we’ll see how that goes. Now if I can just get her past memorizing her multiplication facts!
Oh, and by the way, 4myboys is correct about the math levels. When my daughter was in 4th grade, she started MEP year 3, and my 8th grade daughter was going through MEP year 7.