In the International Association of Library Associations and Institutions guidelines for easy-to-read materials, they detail the importance of making easy-to-read materials available to everyone. In most developed countries, 25 percent of adults do not reach the level of reading skill and fluency expected after nine years of formal education. “Easy-to-read” can include both materials that have been reformatted to be visually easier to read, materials that have been revised for easier to read content, and materials that combine the two methods.