Just a tip. Lincoln is an American school that in my personal opinion is highly overpriced and a bit too American in teachers and student demographic. I remember that they quoted $14,000.00 per for the year for a first grader (class one). They have very nice facilities but I think it is only worth it for the family from the USA who knows that they are returning to the the USA in a couple of years and their employer is paying the school fees.  The teachers tend to be younger American women who are good but seem to be there on more of a temporary stint.Â
I would suggest, British International School in East Legon.  The fees are more like $3,000.00 to $5,000.00 per year. Good quality education but more of a Ghanaian staff whom used to teach in the UK. The student demographic is a bit more upscale Ghanaian mixed with foreigners. I think that is more of what you want the kids to have.Â
Just my opinion.