Hi P.!
I used to dance and was a University dance professor.
First, a young girl should never take dance classes or dance with pain. I did not even allow my professionals to take class with pain. Being sore is fine, being in pain is not!
Second, have your daughter stretch a bit. Not the stretches they do in class.
1. Have her facing a wall with her feet about 12-18 inches away from the wall and her hands on the wall parallel with her shoulders. Have her keep her heels flat on the floor and lean her body towards the wall by bending her arms until she feels a strech.
2. Have her do the same stretch and then while she is stretching, have her bend her knees to stretch out the soleus under the gastrocnemeus muscle.
3. Have her stand near your kitchen counter or island. Have her bend her knees and place her arms under the counter and use her hands to push herself into the floor.
4. While sitting on the floor - have her use her hand to flex her foot and push her toes back gently to stretch and then take her hand away and have her her roll through the foot until it is in a pointed position - repeat.
Also, have her relax on the sofa with you and rub her calves, if you feel knots in her calves - those need to be worked out. In order to avoid her yelling at you - have her sit on the floor with a tennis ball. Place the tennis call under her calve and have her lift her body so some of her body weight is on the ball. This should give her the "hurts but good" feeling.
Also, 3-4 hours of structured dance classes are a lot for an 8 year old. You would be better off doing 1.5 hours every day than this heavy load on her young body. Also, please do not let her go to pointe until she is 9 and a half! Her feet will thank you later!
Good Luck and I hope this helps!
S. M.
The Cerebellum Center
www.cerebellumcenter.com