Good schools for English-speaking kids in Riyadh?

Hi,
Any suggestions for good Elementary schools in Riyadh for English-speaking kids? We just moved from the US to Saudi last month and my son, who is 9, has been struggling with adjusting to his new school. He has lived all of his life in the US and studied KG to 3rd grade over there. Now, he goes to Al-Manhal international school in Riyadh where they teach the “American diploma”. Though the classes are in English, he isn’t happy with the fact that all the kids in the school, as well as most of the teachers, speak Arabic as their first language. He feels somewhat isolated during the breaks when they all start speaking in Arabic. We are originally from Saudi and lived in the US for 10 years and now decided to move back to Saudi.

We have heard about the American International School but the tuition is very high for that one. We thought that some of you might have gone through a similar experience with their kids and can help us with tips and/or suggestions for good international schools where the teachers, and some of the kids speak English as their first language. Thanks, Moh