This paper presents a descriptive case study where infographics--visual representation of data and ideas--have been used as cognitive tools to facilitate learning with multiple representations in the context of secondary school students' science news reporting. Despite the complementary nature of the two research foci, studies on cognitive tools and multiple representations have evolved independently. This is because research on cognitive tools has narrowly focused on technological artifacts and their "impact" on learning outcomes with less attention to learner agency and activity structures. This has created challenges of sustainably applying cognitive tools in classroom teaching and learning. Using data from a design-based research project where secondary school students created authentic infographic-based science news reports, this study demonstrates how infographics can serve as process-oriented cognitive tools for learning and instruction of science literacy in classroom contexts. Results have implications for the study and design of learning environments involving representations.