"Slates have been used for centuries for writing, with their heyday in the 19th century as the need for universal schooling demanded cheap learning technology. It was only when cheap paper became widely available that people moved on. Let’s give slates their due. They were the affordable tablets of the day and played a key role in the improvement of literacy and numeracy for millions of children."
Selected by www.CogBooks.com - the leader in adaptive learning for critical needs - from Donald Clark's Plan B blog.