The Caps for purchase are language tools,  the educator wears  the abstract concepts  as a visual reminder for the language learner. The educator steps into the persona, 
and the language learners follows their lead.

While useful for standard English and other languages, the learning should always be shaped by the educator through instruction. 

Take  language learners on field excursion to community and point out objects and living things, learners record the nouns. 

Todays focus is Nouns..."Point to the Noun in the sentence".