Last week, my daughter's teacher told her she wouldn't be getting her morning recess anymore this year and to just go color in the office. Even though my daughter is on a Behavioral IEP, the teacher didn't even tell me about my daughter losing morning recess. My child now hates school and her teacher. A phone call took care of the recess, but not how she feels inside.
Many kids who can "hold it together" during structured academic class time have much more difficulty coping during open-ended times like recess. You have every right to be concerned about the school's reaction to your daughter's behavior during these more unstructured activity times. If she has a "Behavioral IEP," then behavioral goals and objectives should be spelled out, as well as details on interventions/responses her teachers have in mind for dealing with her problems.
Are there a variety of activities available during recess time? Structured activities that involve clear-cut rules and expectations for behavior can help. Opportunities for playing organized games rather than open-ended activities can eliminate some of the stresses of recess time. Some schools use recess time to offer "clubs" where children have an opportunity to interact in smaller groups exploring an interest (chess, arts and crafts, etc.). Try talking to your daughter's teacher and/or principal to see if they are willing to expand the activities offered during recess so your daughter can be allowed to choose an activity that better meets her needs and interests.
Is your daughter seeing a counselor in school? She may need to role-play appropriate "playground behaviors," including alternatives to impulsive, acting-out behaviors that are causing her to have trouble with the social aspects of free time out of the classroom. As she learns and practices more appropriate behaviors, your daughter should be rewarded in some manner. Her teacher can use a point system where she earns and then trades in her points.
Before you go in to talk to the people at your daughter's school, you might want to have a look at Harvey Parker's book, Problem Solver Guide for Students with ADHD: Ready-to-Use Interventions for Elementary and Secondary Students. Parker offers an abundance of classroom accommodations and intervention strategies to deal with the kinds of problems your daughter is encountering. Preparing yourself with some concrete suggestions for modifying your child's program might be helpful. Good luck!