Spell check doesn’t help. Even with the aid of word processing technology, only about a fourth of American eighth- and 12th-graders can be considered reasonably conversant with Mother English.

So goes a bleak assessment of U.S. students’ writing skills by the National Assessment Governing Board, which issues the annual “Nation’s Report Card.” According to the report, a whopping 24 percent of students in those grades in 2011 could write coherent essays with proper grammar and usage.

Twenty-four percent: That’s an “F” on any curve.

What makes the report especially troubling is that students who took last year’s National Assessment of Educational Progress writing test were allowed to use computers with spell check and thesaurus.

But as Cornelia Orr, executive director of the National Assessment Board, pointed out to the Associated Press, most students in American schools today have such technology at their disposal already — at school, if not at home. Yet without the basic skills of organized thinking and proficiency in language, the tools don’t really help: “It’s as if years ago we had given them a pencil to write the essay and took away the eraser.”

Said another way, even the best calculator won’t enable somebody with no math skills to comprehend laws of physics or geometry.

More than a half-century ago, the Soviet Union’s successful launch of the Sputnik satellite spurred the U.S. into a focus on science and technology that resulted in some of our most dazzling achievements — one of which the recent death of astronaut Neil Armstrong evoked.

Maybe it’s time for another national intellectual challenge. This one should focus on mastery of the most indispensable tool we have — the ability to communicate coherently with one another.

On the other hand …

Some kinds of communication aren’t so indispensable. Telemarketing calls that flout the “Do not call” registry created to protect us from such intrusions would fall into that category.

The Federal Trade Commission reports that complaints about phone solicitations, and especially about those annoying recorded “robocalls,” have skyrocketed. There were about 65,000 such complaints in October of 2010, government records show; this April, there were more than 212,000.

Fewer telemarketers are even checking the FTC list at all: Only about half the number of companies consulted the “Do not call” list last year as in 2007. Adding to the problem is that recorded political campaign calls or charity solicitations are exempt.

Telemarketing is a legitimate, if sometimes annoying, sales tool for legitimate businesses. But having a telephone shouldn’t cancel out one’s choice to be left alone.