The phrase "are commonly covered" is correct and usable in written English.
It can be used to indicate that certain topics or subjects are frequently discussed or addressed in a particular context.
Example: "In this course, various aspects of environmental science are commonly covered, including climate change and biodiversity."
Alternatives: "are often addressed" or "are frequently discussed".
Related aspects of particular areas of graduate study are commonly covered directly from the department.
Topics on the paper will seem familiar – there's an election coming up in October, litter and fly-tipping are commonly covered, as is the future of coal-mining on the archipelago.
The bed and banks of bedrock rivers are sporadically rocky but are commonly covered by a thin and fairly continuous layer of alluvium, though bedrock is everywhere close to the surface.
Jason Post, a spokesman for the mayor, wrote in an e-mail on Saturday: "Other cities bill motorists and their insurance companies to recoup the costs of providing services that are commonly covered by automobile insurance companies, and now New York City will, too.
Capsules for macro-encapsulation are commonly covered with thick membrane that is mechanically stable but at the same time limits nutrient/waste diffusion.
E. distachya community is mainly distributed on dunes from the base to mid-dune and S. terrae-albae exists at the flat slope; both habitats are commonly covered by biological soil crusts (BSCs).
To control the effects of the acid, the surface of the plate is commonly covered in a waxy ground that resists acid.
By 220 million years ago, in the Late Triassic, the continental margins of the new, narrow Tethys Sea were commonly covered by shallow water over fossiliferous carbonate shelf sediments.
Since the surface of dental implants is commonly covered with saliva, we also tested the effects of DC and CHX in the presence of artificial saliva.
These propositions, or props as they are commonly known, cover such important topics as creating a "none of the above" option on ballots (failed) to ensuring the fair treatment of farm animals (passed).
While home nursing care, prescriptions, and medical equipment are all commonly covered by insurance, medically tailored meals are not.
