Here's the response from TUSD:
Dear Mr. ps9,
My name is Kathie Nielsen and I am the Chief Academic Officer in the Tustin Unified School District. I am responding to your recent email on behalf of Dr. Greg Franklin. In terms of opening the primary grades at Orchard Hills, we are monitoring the numbers closely to evaluate the number of students coming in at the primary grades. At this time, we do not anticipate adding primary grades for the 2015-16 school year. The long term goal for the school is to be a K-8, however we are not certain when the attendance area will generate enough students to do this. In the meantime, we are pleased to offer Hicks Canyon as your home school. If you have any other questions, please do not hesitate to contact me.
Thank you,
Kathie Nielsen
Chief Academic Officer
Tustin Unified School District
(714) 730-7301 ext. 309