Over the years I have invested in those "self healing" cutting mats.
They are really nice to have and last FOREVER. I bought them in the
18x24 size. For long straight cuts, I put two tables beside each other
with a slight gap, use a t-square, and pull the knife through the foam
core in the narrow gap between the tables. Works like a charm and no
need for mat board underneath that way.
Visit our student's web art gallery at St.John's School
click on "Stories of SJS," click on "Arts Stories," click on Linda
Woods' name. View artwork by Lower, and Middle School students as well
as our art archives.