From this webpage you can download the original December 2016 edition of *The Fourth R.* A description of that book is given below. *The Fourth R (Second Edition) *is now available.

*The Fourth R (Second Edition) *was published in July 2018. It covers the entire content of the first edition, and about 30% more. All of the references have been brought up to date. A new chapter on “Learning to Do and Doing to Learn” and a new appendix on “Thoughts About a Modern Mathematics Education” have been added.

Read* The Fourth R (Second Edition) *online at http://iae-pedia.org/The_Fourth_R_(Second_Edition) . Download the Microsoft Word file from http://i-a-e.org/downloads/free-ebooks-by-dave-moursund/307-the-fourth-r-second-edition.html. Download the PDF file from http://i-a-e.org/downloads/free-ebooks-by-dave-moursund/308-the-fourth-r-second-edition-1.html.

**Description of the first edition:**

This short book is about adding the **4**^{th}** R** of **R**easoning/Computational Thinking to the traditional **3Rs **of **R**eading, ‘**R**iting, and ‘**R**ithmetic.** R**easoning/Computational Thinking makes use of one’s brain and Information and Communication Technology (ICT)–especially Artificial Intelligence–to represent and solve problems. Like **R**eading, ‘**R**iting, and ‘**R**ithmetic, the** 4th R **is both a discipline of study and an aid to representing and solving problems throughout the curriculum.

The book’s intended audience is preservice and inservice teachers at the PreK-12 levels, as well as all people interested in improving education at these levels. The emphasis is on defining and securing widespread acceptance of a **4**^{th}** R** in the traditional list of **‘R**eading, ‘**R**iting, and ‘**R**ithmetic. My recommendation is that this **4**^{th}** R** **s**hould be thoroughly integrated into the traditional **3Rs** and throughout the curriculum.