Some of the interventions the teacher has implemented would be considered accommodations, such as would be appropriate to a 504 (reduced work load, alternate avenues for demonstrating content acquisition), and others might be modifications, depending on the context (drawing a picture instead of writing a sentence is 504-type accommodation only if the instructional goal is demonstrating science content acquisition, but a curricular modification if the instructional goal is writing sentences).
I would consider this documentation of 504 accommodations being relevant, but not necessarily IEP-type academic delay.
