Thanks for your response! In terms of SES, when thinking about it as a confounder it is important, as we talked about in class, to recognize that this is complicated because the direction of the causal arrow from SES to race/ethnicity does not make sense - so it is really more of a "third variable" whose treatment depends on what your research question is (e.g. do you want to know what the race/ethnicity association is independent of certain SES variables, acknowledging they are usually imperfect measures, or do you want to know the association of an outcome with race/ethnicity without controlling for the mediating effect of SES).
It is also important to think about effect modification as an option for modeling SES (i.e. is the association of race on neurodevelopmental outcomes different among low SES individuals than among high SES individuals).
And I definitely agree that contextual factors could be relevant in your area of research - including policy level factors like availability of publicly funded resources etc.