### Folder Free eBooks by Bob Albrecht

#### document Solar System Perambulations

Microsoft Word file. Most of our heroes are great mathematicians, physicists, and astronomers. Just for the fun of it, we wrote this 58-page document. It lists 53 mathematicians, physicists, and astronomers, one per page. For each entry, we show date of birth, the positions of the eight planets and dwarf planet Pluto on the birth date, a link to the person's Wikipedia web page, and a table of data about the eight planets, dwarf planets Pluto and Ceres, and Earth's Moon.

We also show you how to use the diagram of the planets' orbits to deduce what planets you can see and about what time of day (night) you can see them. We do this exercise with students we tutor – they like it.

#### pdf Mathemagical Meandering

PDF file. Mathemagical Meandering is a free 41-page booklet that you can download as a PDF file or as a Microsoft Word file. It contains a motley assortment of meanderings by Bob Albrecht and George Firedrake. Several of these ramblings were previously posted on the Oregon Council of Teachers of Mathematics (OCTM) listserv. The booklet includes The Plop Investigation, A Plethora of Snakes, A Note on the Science of NFL Football, Round-Robin Tournament SAT Practice Test Question, Measure the Height of a Tall Object, Win a Bag of Money, Solar-System Necklace, Coconut-Carrying Swallows, Use FOIL to Multiply 2-Digit Numbers, Nine to the Nine to the Nine, Eager Eric Wants to be Shorn, Roll 2D6 Doubles Game, Are All Perfect Numbers Triangular Numbers?, and A Word Game Using a TI-84 to 'Roll' 26-Faced Dice. Hey! This is free book. It is AOK if you give snippets or the entire booklet to students, teachers, tutors, parents, grandparents, et al, et al. You can edit and improve the Microsoft Word version. Now here we go meandering again.

#### document Mathemagical Meandering

Microsoft Word file. Mathemagical Meandering is a free 41-page booklet that you can download as a PDF file or as a Microsoft Word file. It contains a motley assortment of meanderings by Bob Albrecht and George Firedrake. Several of these ramblings were previously posted on the Oregon Council of Teachers of Mathematics (OCTM) listserv. The booklet includes The Plop Investigation, A Plethora of Snakes, A Note on the Science of NFL Football, Round-Robin Tournament SAT Practice Test Question, Measure the Height of a Tall Object, Win a Bag of Money, Solar-System Necklace, Coconut-Carrying Swallows, Use FOIL to Multiply 2-Digit Numbers, Nine to the Nine to the Nine, Eager Eric Wants to be Shorn, Roll 2D6 Doubles Game, Are All Perfect Numbers Triangular Numbers?, and A Word Game Using a TI-84 to 'Roll' 26-Faced Dice. Hey! This is free book. It is AOK if you give snippets or the entire booklet to students, teachers, tutors, parents, grandparents, et al, et al. You can edit and improve the Microsoft Word version. Now here we go meandering again.