PDF file. This book is about math tutoring. It is designed to help math tutors and tutees get better at their respective and mutual tasks. The intended audiences for this book include volunteer and paid tutors, preservice and inservice teachers, parents and other child caregivers, students who help other students (peer tutors), and developers of tutorial software and other materials.
If you just want to read the Table of Contents, Preface, first two chapters, and the two appendices, you can do this without doing a long download by going to http://iae-pedia.org/Math_Tutoring.
Here is another recent and free book by Moursund and Albrecht.
Moursund Eugene OR: Information Age Eduction. For details see http://iae-pedia.org/Moursund_and_Albrecht:_Math_games_and_word_problems.