Slab blocks for Canada 150 Big Quilt Bee (June 201

My guild is participating in Canada's Big Quilt Bee for Canada 150 birthday in June 150. The goal is to make 1000 quilts for Ronald McDonald home for families staying while their child is in hospital. Some are there for months, year. These are to be 'slab blocks' measuring 12 1/2", with one piece of Northcott' and other Canada 150 fabric. I made 12 in about 3 hours. And I will be making more assembled as a quilt.