He got dinged on two things, which are highly instructive.

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Although the Opinion is unpublished, it is highly instructive.

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Teaching-learning materials are designed to help facilitators to develop the reading and writing skills of their learners through a highly instructive teaching-learning process as well as guided practice by the learners (see pictures below).

UNESCO: Kha Ri Gude (Let Us Learn) Adult Literacy Programme (KGALP)

Such benchmarking would be highly instructive.

FORBES: Magazine Article