Adding Group Level information to individual users

[DogManager]

Hello,
I have a data set that includes students within schools. Each student has demographic information. Initially there was in one Ethnicity variable, but I created separate binary variables for each Ethnic group. I want to store school-level totals within each individual student, so in addition to personal information, I can also see the number of students within the school, and the numbers of each ethnic group within that school.

I've tried using group_by, summarize, and tally within mutate, but maybe I'm not thinking about this the right way.

TLDR: How can I add group level demographic variables to individuals within each group?

[startz]

It would help if you were to post a relevant piece of your data set, as well as the code you've tried.

[EconProf]

Assuming you have two data frames, one with student data (including school name) and one with school data (including school name), this sounds like a job for a join function like left_join().