Clay With Large Class Sizes

 Class sizes have been an issue this year.  I know that others have it worse, but a large class size is a large class size.  Students do better in smaller classes...FACT!  We have four 2nd grade classes all at 25 students each.  We have four 4th grade classes now(as of a week ago), but my special area team voted to keep the old schedule to avoid having a split planning time(I did not vote to keep the old schedule), and have the three 4th grade classes at 31, 31, and 29 come to specials.  It is a struggle to restructure lessons and manage supplies when classes are large.  Just 5 to 10 more students than "normal" can really through the balance of a class off.  I have managed to do the coil pot lesson with 2nd grade, but there is more of a "rush" on my end of things in prepping for before class & firing.  I also feel like my flying through clay!!! How do you all handle large class sizes?  What are your biggest classes?(I'm coming at this from an elementary perspective.)