Part time online schooling

[mzgerry]

Hello,
New comer here ! My children are currently attending an international school (British curriculum) but we are considering moving back to France next year. There won't be any international sections or schools in the area we are planning to settle in so we are looking for online options to help them maintain their English levels.
They will be attending a french school. My husband is French and we speak French at home. I could do English but it is not my first language and doesn't come naturally and 100% perfect... So we would need to enroll them in English and maybe one or 2 additional subjects depending on available hours. Our objective is to enable them to remain bilingual, not really to pass British exams.
Is anyone in this situation ? Which online school would you recommend ?
Thank you !