Considering how little the average parent in America helps their grade school age children with their classes, I'd say that making your 10 year old study like this every night is far from the worst thing you could do to them.
One thing I've noticed is that here reluctance/enthusiasm to study is directly tied to how efficient she feels the studying will be. If she knows she'll get an A because she does effort Y, she will do effort Y. My problem with the school system is that studying is too disconnected from results, and so kids end up feeling like their test results are random. That's a killer.