Different times have different teaching tasks, which is the sign of human progress.
Just like after the invention of computers, those methods of how to do manual calculations faster can be eliminated from teaching tasks. Education shifted towards teaching students how to use computational tools effectively. This allowed students to solve more complex problems and work on higher-level concepts that manual calculations couldn't easily address.
In the era of AI, what teachers need to think about is not to punitively prohibit students from using AI, but to adjust the teaching content to better help students master related subjects faster and better through AI.
On one hand I tend to agree because these students will also be able to use AI when they actually hit the workplace, but on the other hand it has never happened that the tools we use are better than us at so many tasks.
How long before a centaur team of human + AI is less effective than the AI alone?