The puzzles in 'Les Problemes logiques et lateraux' take French cross-curricular. The puzzles are arranged into the main topics that are taught at KS3 and KS4 to make it easy to find a puzzle which fits a lesson objective. Written in French, the puzzles are accessible to all whether a native or a learner of French. The puzzles have been extensively trialled in the classroom, and work well when used as starters, in plenaries and as a homework task. Pupils find the puzzles engaging, challenging and most importantly fun, especially when they are set as a class competition.