In a recent question regarding measurement units (first posted July 9, 2017) Tung mentions having the newly released Lessons 4 of AN INTRODUCTION TO BRAILLE MATEMATICS (4/25/2017 revision).
We have only been able to find the table of contents for lessons 1-6, front matter and study tips, and the revision log. The revision log mentions lessons 1-4 and gives the dates that they were first uploaded. However, we cannot find lessons 1-4. Could you point us in the right direction?
The Provisional Revised Nemeth Course Manual is currently hosted on NFB's website. The following link should take you to a page from which revision logs, front matter, table of contents, Lessons 1-8, and an appendix – in both PDF and BRF files – are available.