The phrase "a long teaching" is correct and usable in written English.
It can be used when referring to an extended lesson or educational session, often in an academic or instructional context.
Example: "The professor delivered a long teaching on the complexities of quantum mechanics that left the students in deep thought."
Alternatives: "an extensive lesson" or "a lengthy lecture".
He also began a long teaching career in 1942.
After a long teaching career in the United States, I am now retired in the North Carolina mountain resort town of Asheville.
Though I have had a long teaching career, giving grades has never been my forte, and so I will not attempt to evaluate my life with just an abstract letter grade.
John D. LaPorta, a classically trained clarinetist who performed with the stars of early modern jazz before beginning a long teaching and composing career, died here on Wednesday, his family announced.
He then began a long teaching career, including positions at the University of Louisville; the University of California, Davis; Yale; Columbia; the State University of New York, Buffalo and Queenss College of the City University of New York, from which he retired in 1985.
The group of lecturers came from nine academic departments and 53% had a long teaching experience (6 to over 15 years).
Figures are strung like a row of beads along a long, taught rope - they are hoisting a gigantic tank into position.
"We have a very long teaching day for some children – if they are falling behind we keep them back at the end of the day so that they can improve their qualifications".
In an unusually long teaching career of nearly two decades, he became the college's most revered teacher, elevating it out of relative obscurity.
As an academic too, in his long teaching career at Glasgow University, he could captivate his student audience, bring literature to life.
He had a long career teaching computer systems at Empire Blue Cross Blue Shield in New York and was an adjunct professor at Pace University.
