Which edition of the Handbook of Nature Study???
I use the edition with the copyright date of 1967 (paperback edition ISBN 0-8014-9384-6) for page numbers and lesson numbers. (Shown above in my affiliate link.) If you have a different version of the Handbook of Nature Study, you can easily find the corresponding pages by using the following suggestions.
1. Topic – almost every Outdoor Hour Challenge is a focused on a specific topic found in the Handbook of Nature Study. Use the Table of Contents to find that topic by looking for the appropriate category.
2. Lesson Number- almost every Outdoor Hour Challenge points you to a lesson in the Handbook of Nature Study. In the older editions those lessons are given in Roman Numerals. Many of the lesson numbers are the same but unfortunately not all…your best bet is to use the Table of Contents.
1. If you are using digital copies that came in a number of downloads, you will need to print the table of contents from the first download and use it as a guide to which pdf to use for your Outdoor Hour Challenge. (Homeschool Freebie of the Day offers the Handbook of Nature Study as a free download from time to time.)
2. For the challenges that give you a few pages to read in the introduction of the Handbook of Nature Study, I have given you the section names so you can find them in your edition of the book. (I edited the first ten Outdoor Hour Challenges to include section names.)
I hope that helps you use whatever edition of the Handbook of Nature Study you have on your shelf.