The blackboard on the Back to School Visa Gift Card is a universal symbol of education. Students used to carry individual slates to class because they were reusable and more plentiful than paper. Scottish education James Pillans wanted his entire class see the same thing at once, so he hung a big piece of slate on his classroom wall in 1801 and the concept of the blackboard was born. Whether black, green, whiteboards or any other color, chalk boards and dry erase boards remains a valuable aid to education because they are highly interactive. Celebrate teachers, students and schools with Back to School Visa Gift Cards.