I haven't cracked open a textbook in 2 years. When I did use the textbook, I used it sparingly. The Internet provided me with all of the content I needed to teach my 7th grade social studies class. I would be willing to bet that ANY class's curriculum requirements could be met with FREE materials from the Internet. I'd love to take that challenge.
Worksheets? When I used them, I always used my own worksheets. I don't even like to say the word. Worksheets are an artifact of an obsolete teaching method, especially in a 1 to 1, digital curriculum. Engaging projects are easy to build and far more effective.
Most people love a good Do It Yourself project. Why do we shy away from it in education and rely on stale, static resources (textbooks/worksheets) that everyone agrees are not best practice? A DIY Education would be authentic, engaging, and cost effective. A small district like mine can easily spend $90,000 on textbooks and related materials every six years. EVERY SIX YEARS! While we are reimbursed for that expense, the money has to come from somewhere. It would be much better, in many ways, to pay teachers a higher salary and require them to create their own materials. If teachers simply pass out textbooks, assign questions, grade, and repeat, we should probably be replaced by a computer program.