This article provides commentary on "Investigating the Impact of Literacy-infused Science Intervention on Economically Challenged Students' Science Achievement: A Case Study from a Rural District in Texas" (EJ1306217) which is about the impact of educational interventions on the scientific and academic achievements of students from economically challenged rural families (Irby et al., 2021). The commentary discusses British educational sociologist B. Bernstein's (2003) belief that in human social communication, the language signs used by people can be divided into exquisite signs and restrictive signs, and claims the case study proves this theory of language.