Women's Equality Network Wales have produced a schools' toolkit to celebrate International Women's Day.
It opens with a set of Stonewall definitions (p4). Last on the list, under 'non-binary' and 'transgender' is the definition for woman/girl. One which might surprise you::
a female person. This includes transwomen and girls, as well as ciswomen and girls
It also provides fact-free definitions for 'cisgender', 'gender equality', 'gender identity'. There's one for 'intersectional' that includes 'class, gender and socio-economic status' but omits sex. Plus 'non-binary', 'privilege', 'sex' (assigned at birth obviously, and based on 'reproductive organs'), and 'transgender'.
For International Women's Day.