The modified version is, "During our social studies class, we learned about First Lady Eleanor Roosevelt's advocacy for human rights."
How to modify the sentence ?
In this sentence, the change made was to replace "read" with "learned about" to make it more explicit that the information about Eleanor Roosevelt's advocacy for human rights was acquired during the class.
This modification clarifies that the students gained knowledge about her work through a lesson or discussion in their social studies class. Eleanor Roosevelt, the wife of President Franklin D. Roosevelt, was a prominent and influential First Lady of the United States. She is best known for her tireless efforts in championing human rights both domestically and internationally.