# How to visualize differences between groups based on category?

I have two datasets of schoolchildren performance by height in cm, one for each school. I was wondering how to best visualize how the differences in the performance between the schools vary by grade. I was thinking of creating a regression for both school's performances, and graphing the differences between the two lines, but I'm not sure how rigorous or informative that would be.

ggplot(data = diamonds, aes(carat, price, color = color))+