Not so much homeschooling specifically as Christian, mostly Protestant, political conservatives (often theologically fundamentalist, but not exclusively). Sometimes they also homesick as a reaction to content in public schools, but in many places in the US they've been fairly successful in dominating school authorities at the local and even state level and directing the curriculum.

But American religious/political activist groups often work to expiry their views overseas as well and implement similar policies -- there's been some attention to that on anti-gay policies, but pro-creationism features some of the same tactics.