The word for today is…

didactic (adj) – 1. Intended to instruct.
2. Morally instructive.
3. Inclined to teach or moralise excessively.

Source : The Free Dictionary

Etymology : “fitted or intended for instruction; pertaining to instruction,” 1650s, from French didactique, from Latinised form of Greek didaktikos “apt at teaching,” from didaktos “taught,” past participle of didaskein “teach,” from PIE *dens- “to learn” (source also of Sanskrit dasra- “effecting miracles”).

Peter is a fourth-generation New Zealander, with his mother's and father's folks having arrived in New Zealand in the 1870s. He lives in Lower Hutt with his wife, some cats and assorted computers. His...