The irony of the first assignment :-)
Yes it is doable, about 3 hours work to get it all done. Even if she isn't home until 5.30 then she will be done by 9pm. It is a lot more difficult if she has any team sports after school or other commitments to do.
The time management bit should help her understand how she needs to schedule in extra time for A levels at home. Or do some of the work at lunch on evenings she knows she will be busy. A levels are a steep learning curve.