§9. When a child learns this language, it has to learn the series of 'numerals' a, b, c,... by heart. And it has to learn their use.—Will this training include ostensive teaching of the words?—Well, people will, for example, point to slabs and count: "a, b, c slabs".—Something more like the ostensive teaching of the words "block", "pillar", etc. would be the ostensive teaching of numerals that serve not to count but to refer to groups of objects that can be taken in at a glance. Children do learn the use of the first five or six cardinal numerals in this way.
Are "there" and "this" also taught ostensively?—Imagine how one might perhaps teach their use. One will point to places and things—but in this case the pointing occurs in the use of the words too and not merely in learning the use.—