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Working on a single model, as efficient as it might be, will not allow us to progress in our methods. That is why, faced with the clinical diversity of children on the autism spectrum, the PREAUT team and its partners reflected on new ways to care for children whose developmental profile places them below the cognitive level, and for those who have correctly acquired the invariables supplemented by a “class-workshop” type tool and who are progressing further in their learning process. This article addresses the topic of the recently named PREAUT developmental units (PDU), PREAUT pedagogical units level 1 (PPU 1), and PREAUT pedagogical units level 2 (PPU 2). For the latter, the PREAUT team relies on the works of Patrick Binisti on the subject of tutor interactions.