The coach will probably just spot her on two when he/she feels she is ready. The back handspring is not the important part...it is the connection between the two. Snap downs are the basic drill.
A few questions...
1. Can your daughter do a roundoff back handspring (RO-BHS)?
2. Can she do a standing BHS to a nice rebound.
3. Does she rebound backwards?
Below is a link to a fairly nice BHS. This girl does have some small problems with her BHS, but she is ready to work 2.
http://www.gymnasticsrevolution.com/...Handspring.htm
4. How is your daughters BHS compared to that girls?