by Bill Gates — Textbooks are becoming obsolete as software is finally changing how students learn. I read more than my share of textbooks. But it’s a pretty limited way to learn something. Even the best text can’t figure out which concepts you understand and which ones you need more help with. It certainly can’t tell your teacher how well you grasped last night’s assigned reading. But now, thanks to software, the standalone textbook is becoming a thing of the past. Suppose you’re taking high school algebra. Instead of just reading a chapter on solving equations, you can look at the text online, watch a super-engaging video that shows you how it’s done, and play a game that reinforces the concepts. Then you solve a few problems online, and the software creates new quiz questions to zero in on the ideas you’re not quite getting.
All of this is a complement to what teachers do, not a replacement. Your teacher gets a rich report showing what you read and watched, which problems you got right and wrong, and the areas where you need more help. When you come to class the next day, she is equipped with a ton of specific information and suggestions to help her make the most of her time with you. When I told you about this type of software in previous letters, it was mostly speculative. But now I can report that these tools have been adopted in thousands of U.S. classrooms from kindergarten through high school. Zearn, i-Ready, and LearnZillion are examples of digital curricula used by students and teachers throughout the U.S. More than 3,000 schools are teaching a free digital course that I fund called Big History, which uses software to give students immediate feedback on their writing assignments.