Most jewish brides, like myself, where the exact same dresses as any Christians, but with their sholders covered - not necessarily sleeves (sleeveless is okay) but not strapless. Very religious brides will wear long sleeves. Otherwise, no difference.
I've dealt with Discount Dance for years. The product is affordable and of high quality. Check out the dance dresses. They have some for every type of performance.
For the dresses and skirts that do not come with a cover up, you could use a pair of cloth shorts. kinda like the pj shorts (you wont want to use jean shorts) or use the bloomers from one of the other dresses if you have them. If she is at home I wou...