Do you have any tips/exercises for a horse that hasn’t schooled in 2 years? She is ridden weekly on a hack but hasn’t schooled, and can be nasty in the school

Thank you
I Personally would say to just try taking her to as many schoolings as possible and when she is being good reward her with positive reinforcement . The more you do it the more she will come accustom to the environment of schooling.
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