Hi Werner, LibreTexts has just opened a K-12 library and we have a uniquely large number of distribution channels, including a raspberry pi based LibreTexts in a box, automatic generation of printable textbooks which can be printed at very low cost by just in time printers in Chile, a coming cell phone app and more.
If you have time we are going to talk about the project at 4:20 US EST today :sync: LibreTexts, A Customizable and Globally Available OER Repository for All
and we have office hours later and tomorrow OEG 2020 Gold Sponsor: LibreTexts