This paper aims to guide the training of all Latin instructors and learners who want to optimise the process of acquiring the language by applying the results of research carried out in the field of Second Language Acquisition (SLA), specifically here those related to the acquisition of vocabulary. Consequently, some theoretical considerations on the psycholinguistic operations that govern vocabulary learning are first offered, in order to build a better understanding of language acquisition and to make instructors and learners more knowledgeable about the vocabulary learning process, from the noticing of an unknown word and its integration into the subject's competence to the expansion and development of knowledge about the acquired words. The theoretical aspects of vocabulary learning will be illustrated at all times with practical examples taken from methods and books for learning Latin, as well as, in the fourth section, with a wide catalogue of practical advice – must-do items for the class – that can be easily implemented by Latin instructors.
