A troubleshooting approach takes five types of thinking that students typically struggle with - processing information; reasoning; inquiry; creative thinking; evaluation - and matches then with 'thinking tools'. These include 'odd one out', 'concept lines', 'inference squares', 'kick cards' and 'diamond ranking'. Each tool is explained and exemplified with instructions and teaching tips for classroom use. Lists of words and phrases help students take stock of their learning and to talk about their thinking.