The rule of thumb in ESE is re-evaluate every three years...but only in areas you have questions about or need more information about.
Just as an example--- So if you have an IQ from three years ago done with a widely respected instrument and everyone agrees it is pretty much accurate for what they see day to day, then why redo it...but if many people think an updated evaluation from the OT might be helpful then go for it. The reevaluation committee, parent included, for a student meets and discusses and develops the list of areas that need assessment and then parent consents.
I am not sure about re-evaluating for 504 plans.
