Chinese people always say: that girls are bad at maths.

Besides, tThey also like to say: girls a they're bad at studying, especially science.

It is very common for Chinese girls who get high scores as primary school students or middle school students to experience the stuff like this: people keep telling you that even though you are good at studying now, but it will be very hard for you after you enter senior high school, and your scores will become lower.

Even though/although is not paired with "but" in English.

At the same time, people exclaim that: boys improve themselves quite fastquite quickly if they focus on studying because they are so smart, t. The main reason why they get lower grades is their laziness, while the only reason of girls get great grades is their hard work.

This could easily be one sentence in Chinese, but in English it needs to be broken up, even though there's only one main idea throughout.

I think they areit's totally bullshit and sexismt.

Agreed

I always keep telling to the parents that the theorieexplanations don't make sense, they are just biased.

Sometimes there are some cases you know coincidently can provis anecdotal evidence that can reinforce your view, though.

It is more likely becausethat people keep implytelling girls that they will screw up their studies, and unfortunately, it works.

Then, you just see what you want to see, and take it as example or evidence to prove your theory.

(There is a professional word explain theis phenomenon, but I've forgeottoen.)

I'm not sure if there's a word specifically for the girls doing worse when they're told that they're doing worse, if there is I can't remember it. This is a similar concept to confirmation bias, though. You might also look at negative reinforcement.