Would she be able to verbally tell a story or give her ideas on using numbers creatively? Maybe a number pattern she has recognized or how to do simple fractions and then you could capture that on video? I'm guessing that being able to do simple fractions will be approx. 2-3 years ahead of age. And if she could describe her thoughts clearly, that would be a strong representation in itself.

Do you have to submit materials showing strength in math? Does she enjoy science for e.g.?