The development of a new type of approach model of language learning is assumed to be based on the reference points establishing it conceptually. The general concept of approach is verified in terms of the conventional categories of domain, set, set element (subset), set extension, set intension, and hierarchy. A new type of approach to language learning proposed in the chapter is assumed to be conceptually established in the framework of a theoretical model construed as a functional domain comprising a hierarchical set of elements, approach being the top member but method and technique forming subset elements. The hierarchical approach set has both extensional and intensional projections, which are mapped onto the actual learning and teaching procedure and transformed into external and internal language acquisition segments, correspondingly. Thought-outward target language speech interrelations are thus represented. This is the way the functional correlation between theoretical grounds of the approach conception and curriculum procedure is established. The function characterizing approach dimensions is a multifold dichotomized formation whose duality is being made up of 1) the internal-external opposition, 2) source-target language opposition, 3) verbal dissimilarity opposition. The function in question gets delineated at the intersection of the dichotomies and designated as predication. Predication is an invariant unit of instruction surfaced in the form of the approach radix. The approach under consideration acquires the same contingent name. The main issues considered include the justification of the descriptive approach terminology, the functional modeling of approach, source-target language relationship in approach modeling, types of speech in approach modeling, and the invariant approach to language learning: introductory statements.