The Māori embraced literacy enthusiastically, and missionaries reported in the 1820s that Māori all over the country taught each other to read and write, using sometimes quite innovative materials in the absence of paper, such as leaves and charcoal, and flax. Missionary James West Stack recorded the scarcity of slates and writing materials at the Native schools and the use sometimes of "pieces of board on which sand was sprinkled, and the letters traced upon the sand with a pointed stick".