PARTICULAR TEACHER AT HOME IN MADRID

Hello,
I´m looking for a personal conversation teacher at home, for 2 children (9&10 years old).
30 or 45 minutes with each on Tuesdays afternoon (starting at 17.30h). The idea is to conversate with them but also if they have exams in english, help them to study.
We live in Madrid in Arturo Soria area.