The phrase "inadequate teaching" refers to a situation where an educator is not effectively imparting knowledge or skills to their students. Full definition
A group of students who said their education suffered because of inadequate teaching brought the lawsuit. (politico.com)
Inadequate teaching in both church and college will always have consequences. (premierchristianity.com)
Concerns over our educational system, fueled by our students» poor performance in international comparisons of achievement, have reinvigorated the call for early academic instruction as a remedy for inadequate teaching later on. (educationnext.org)