Eventually, I'll port this to HTML, but at the moment it is only available as PDF or, for those who want to remix, in the original L^AT_EX source.

Here is the PDF version.

And here are the files one needs to make this with L^AT_EX:

1. The actual source: OER4ColoMATYC.tex.
2. Required image files:
   1. all_CC.pdf
   2. bookshelf_composite.pdf
   3. CC-BY-SA.pdf
   4. colorado_tuition_vs_state.pdf
   5. commercial_highlighted.pdf
   6. commercial.pdf
   7. costs_graph.pdf
   8. costs_key.pdf
   9. poritz_net_jonathan_qr-code_colorful.pdf
   10. SoA_Euclid.pdf
   11. SoA_Pythagoras.pdf
   12. textbook_pain.pdf
   13. textbooks1980.pdf
   14. _The_School_of_Athens__by_Raffaello_Sanzio_da_Urbino.pdf
   15. UNflag.pdf
   16. USflag.pdf

On my machine, which is running Linux Mint "18.3 (Sylvia)" and which has a quite complete suite of texlive packages (including, crucially, texlive-base and texlive-latex-base; other required L^AT_EX packages will be obvious to anyone who knows L^AT_EX when looking at the \includepackage commands in the OER4ColoMATYC.tex source file), at the command line, I do the following in a directory containing the above files:

          pdflatex OER4ColoMATYC
          pdflatex OER4ColoMATYC
      

If you want just to download one archive with all of those files in it, you could use either of the following two choices:

• OER4ColoMATYCFiles.tar — a tar archive, for Linux users
• OER4ColoMATYCFiles.zip — a zip archive, for users of other operating systems