So the portion of the TOWL that was administered does have a time limit (15 minutes), but should still generate a reasonable score if at least 30-50 words were written (one good paragraph).
I would agree that modifying her existing 504 is the quickest way to get accommodations in place. You may wish to start the IEP eligibility process sooner rather than later, though, in parallel with monitoring the effectiveness of the new accommodations, as, although you can ask for reduced writing work load as a 504 accommodation, it will have more legs if it's in an IEP.
And yes, if she doesn't want to lose her elective, the IEP team can decide on another way to provide her with the services she needs. In fact, ideally, she should be receiving inclusion services in writing, so that she can work on her writing using actual ELA/SS assignments, rather than additional work, so the general ed teacher receives the benefit of consult and modeling of accommodations from the special ed teacher, and so there is continuity between strategies and accommodations taught by the special ed teacher and those provided by the general ed teacher.
