Randall I. Charles

• Math
• Introducción al álgebra
• Addison-Wesley Mathematics Practie Workbook, Grade 6
• Algebra 2 Indiana Teacher's Edition Volume 2
• HIGH SCHOOL MATH 2012 COMMON CORE ALGEBRA 1 PART 2
• Math : Grade 3
• Mathematics
• Middle School Math (Scott Foresman-Addison Wesley, Course 2 Volume 2 Chapters 7-12)