Edit: the textbooks are freely available on the web, if anyone wishes to take a look. Look up "NCERT class 10 maths textbook".
Information is laser focused on getting into an "Engineering college" and not actually on "knowing" anything. It's like teaching someone about spoons and forks but never giving them any food to actually interact with but vaguely mention "food will be relevant when you get a job, not right now"
Better than american kids sure but i'm not sure anything more of value is earned by making these kids essentially memorize theorems and algorithms
You should also think about if it's more important (to the people you're telling that message) to get a good wage or if they're fine taking a few years to catch up.
"Understanding" concepts is great and all, but unless they're doing that additionally to training the simple application, they'll most likely start having issues once the tests are up.
Having good grades (and being able to prove their ability on the spot) is definitely correlated with good starting wages. Not so much later on, but it's a massive difference at the start.