One of the best ways to get an idea of schooling in a particular area is by talking to the local people. Ask parents where their children go to school, and how happy they are with their education, but bear in mind that there may be some bias.
If you know any teachers, or visit a school open day, try and find out what the working environment is like in particular primary and secondary schools. The more supportive a school is of its teachers and pupils, the better it will probably be for your child.
If you want your children to go to a good school within a certain area, you need to consider its catchment area. You can find information about school catchment areas on the government schools admission website. You can also find out which primary schools “feed” certain secondary schools, so that you know if your child’s next school will be as good as the one they currently go to.