Hi iybuyk,
Both my dds are in an immersion program. It has been a terrific opportunity for them. My oldest went to a private pre-K that was one year advanced (but not a gifted school) and was bored out of her mind. When we put her in the immersion program she was finally challenged and also had a shared experience of learning a new language with her classmates. My oldest is now in 4th grade. We are planning to homeschool her next year because she is fluent in her second language and elementary school really has nothing further to offer her, but the immersion program was the best option for her up to this point.
Every situation and child is different, but I definitely recommend looking into the immersion program. Though I suspect learning a new language will offer your child some challenges, it won't solve the math problem. I am really surprised to hear that a gifted school is using Kumon for math. Kumon tends to be a drill & kill type of math program and can be stifling for mathematically gifted children.
