The difficulty with science education is that so much of it is actually reeducation.
I find teaching of science fairly easy. I have no difficulties with science education; my difficulties are with science reeducation. If I can teach something about which the students have never heard, I find that they generally both welcome and understand it. It is when I have to teach them about something that they have already learned incorrectly, that I start to identify with Sisyphus.
Why is science reeducation so difficult? I have identified two possible reasons, you may know of others.
Jonathan Swift is reputed to have observed (I cannot find the original reference), "You cannot reason a person out of a position he did not reason himself into in the first place." So, if science is taught as just a collection of (assumed-to-be) facts, it is nothing but dogma. Dogma stoutly resists subsequent displacement by reason.
It seems that anything people have learned prior to puberty takes on the status of an immutable truth (this is something well understood by parents, governments, and religions). Rational explanations of why some previous belief might be incompatible with the behavior of nature, and a careful explanation of the actual behavior of nature are of little avail.
So, if science is taught as dogma to the prepubescent, just imagine the problem created for subsequent teachers. For example, most of the university students I encounter have been taught as children that the reason clouds form when air is cooled is that cold air cannot hold as much water vapor as does warm air. When I subsequently carefully explain what is really happening, and show why the previously learned nostrum is nonsense parading as science, I can usually only convince a small fraction of the students. The rest know in their hearts that their grade-eight teacher, say, or their mother was actually right and that you are just a contrarian who is attempting to destroy the established order. The damage is done, the mind is frozen and the prepubescent dogma lasts a lifetime.