Welcome to BYC!
Looks like a male in the 6th picture but all the rest female so I'd say she's a goose
It is indeed a cross between an African and Chinese goose as it has Chinese features and also African.
Her head is big making it on the African side but has big bugle eyes like a Chinese.
She is too wide to be pure Chinese and too small to be pure African.
The big give away is that she has no dewlap(flap of skin under the beak and it doesn't look like he will get a dewlap either.
Her knob is as wide as her head which indicates African.
Another give away is that her feet are pinkish like African geese feet colour while the Chinese have very orange legs.
She has a thick short neck like an African but not thick enough for African standards.
She has more African features so I'm guessing her father was a African and her mother was a Chinese (common cross).
Hope it helped
Btw don't be surprised if you see large white eggs around the classroom in a month or two
