Doha College and DESS (Doha English Speaking School) are the two most popular ones for sure. DESS requiring British passport for a more likely entry.

The younger years are more popular and fill up fast. We applied to both (got neither) but ended up at a British Curriculum International School near where we live.

We couldn't be more happy with it. Our son is coming on leaps and bounds and the teacher are excellent (all from the UK).