By MAY ZHOU in Houston | China Daily Global | Updated: 2021-04-02 11:15 Share CLOSE Sally Sha holds a sign as people protest after the deadly shootings in Georgia and against violence targeting Asian people, in Houston, Texas, US, March 20, 2021. [Photo/Agencies] A derogatory question about China on a sixth-grade social studies quiz has led to the suspension of three teachers and an investigation in a Dallas-area school district. Joy Lim, a Korean-American college student studying at home remotely, said she was shocked when she got a glimpse of a middle school social studies quiz her 12-year-old sister was taking. She snapped a screen shot of the question and posted it on Twitter, stating: "This is ridiculous. Harmful rhetoric in our education system is exactly why anti-Asian hate crimes and racism persist today."