This report details an ongoing investigation of the decision-making processes of a group of secondary school students in south-eastern Australia undertaking information search tasks. The study is situated in the field of information seeking and use, and, more broadly, in decision making. Research questions focus on students' decisions about the relevance and reliability of information. Data collected include video screen captures, think-aloud reports, and interviews. Qualitative data analysis developed a preliminary grounded theory to describe decision-making processes. Students depended on system-provided relevance cues, rejected particular resource categories, examined remaining items for general and specific relevance, and primarily used a process of corroboration to assess reliability. Selected implications for educators are raised. Interview topic guides are appended. (Contains 1 figure and 1 table.)