A CM manual taking into account the progressiveness benchmarks for the implementation in cycle 3 of the Science and Technology program. The manual offers CM1 and CM2 students a pleasant working environment structured around the four main themes of the “Science and Technology” program. The scientific and technological approaches, simple and accessible, are organized around three key stages: questioning, researching and realizing and structuring your knowledge. For each end-of-cycle expectation, summary pages offer a rigorous summary in written or visual form to facilitate memorization. Concrete interdisciplinary projects punctuate the manual. Methodological sheets give students indications on the success of the work to be accomplished. A glossary is proposed to help acquire the basics of scientific language.