Educating them (especially women), giving them contraceptives, etc., is the positive approach to this, in my opinion.
The issue here is to make those who have a lot of children have less children. Giving money, and contraceptives, and free sterilisation, and education should all be done.
Edit: Please see https://en.wikipedia.org/wiki/Compulsory_sterilization#Affec...
> Funding of welfare mothers by HEW (Health, Education, and Welfare) covers roughy 90% of cost and doctors are likely to concur with the compulsory sterilization of welfare mothers. Threats to cease welfare occur when women are hesitant to consent.
If we don't make things happen, education by itself might take 20 years for the first results. We need to change things very quickly. We're already very late and made things worse by improving survival rates without enforcing birth control.