Teresa Connolly argues that a profound understanding of key chemistry concepts and processes is as fundamental to scientific literacy as mastering complex procedures and skills, such as performing experiments, interpreting data or communicating one’s findings using specific text types. However, she points out that such an understanding of chemical concepts is inhibited not only by learners’ poor command of academic language but also by the fact that chemical processes can be observed at different levels of abstraction. This poses a specific challenge in chemistry because learners often report having difficulties distinguishing clearly between processes at the sub-microscopic, the microscopic and the macroscopic level, which will lead to misconceptions and prevent deeper understanding. To address that issue, Connolly’s deeper learning episode on redox reactions offers engaging ways of promoting scientific reasoning through a series of student-led experiments and inquiry. Systematic guidance in academic language use will enable learners to express their findings and observations precisely and adequately and thus help them distinguish the processes occurring at various levels of abstraction with increasing ease and confidence.