But the material is not the problem. You have the whole world knowledge at your fingers, in books, the internet, etc. Schaum's outline will give you hundreds of worked problems. The problem is that the student sees no possible solution to this if she is not handed the solution by her instructor.
>Does it? If by clear you mean "relating to the anecdote you shared at the top of your comment", then sure - but that is far from my standard for "clear," at least.
It's a temporal correlation that all my colleagues observe as well. Average grades drop by 50% using the identical material that was always successful pre-pandemic.
So you find it more likely that lockdown, restricted gathering in learning groups, Zoom lectures, potential financial hardship had no impact on learning whatsoever? That's not quite up to my standard.