Humans are not from Earth: a scientific evaluation of the evidence

The Comedy of Numbers: Witty Math Challenges: > 120 Math Puzzles | Algebra | Geometry | Probability | Logic & Sudoku | Ages >12 | Math Practice Workbook

Spectrum 8th Grade Math Workbook, Mathematics Middle School Books Covering Pythagorean Theorem, Geometry, Linear Equations, Rational and Irrational Numbers and More, Classroom or Homeschool Curriculum

Kumon Pre Algebra-Grades 6-8 (Kumon Middle School Math Workbooks)

Kumon Algebra-Grades 6-8 (Kumon Middle School Math Workbooks)

Summer Bridge Activities 7th Grade to 8th Grade Workbooks All Subjects, Math, Language Arts, Science, Social Studies, Fitness, Seventh & Eighth Grade With Flash Cards, eBooks & More (Volume 9)

Spectrum 7th Grade Test Practice Workbooks All Subjects, Ages 12 to 13, Grade 7 Test Practice, Language Arts, Reading Comprehension, Vocabulary, Writing and Math Reproducible Book - 160 Pages

Spectrum 7th Grade Math Workbooks, Mathematics Middle School Books Covering Geometry, Algebra, Ratio, Integers, and More, Classroom or Homeschool Curriculum

IXL The Ultimate 7th Grade Math Workbook, Middle School Books for Kids Ages 12-13 Covering Geometry, Algebra, Probability, Ratio, and More Mathematics (IXL Ultimate Workbooks)