klmno is correct. Minor amendments to the IEP can be made without an IEP meeting as long as the parent agrees. This must be done in writing.
Also see http://idea.ed.gov/explore/view/p/%2...252E324%2Ca%2C :
(4) Agreement. (i) In making changes to a child's IEP after the annual IEP Team meeting for a school year, the parent of a child with a disability and the public agency may agree not to convene an IEP Team meeting for the purposes of making those changes, and instead may develop a written document to amend or modify the child's current IEP.
(ii) If changes are made to the child's IEP in accordance with paragraph (a)(4)(i) of this section, the public agency must ensure that the child's IEP Team is informed of those changes.
(5) Consolidation of IEP Team meetings. To the extent possible, the public agency must encourage the consolidation of reevaluation meetings for the child and other IEP Team meetings for the child.
(6) Amendments. Changes to the IEP may be made either by the entire IEP Team at an IEP Team meeting, or as provided in paragraph (a)(4) of this section, by amending the IEP rather than by redrafting the entire IEP. Upon request, a parent must be provided with a revised copy of the IEP with the amendments incorporated.
