Basic Math

Harold's Cheat Sheets
Harold's PEMDAS Cheat Sheet	Docx	Order of operations: PEMDAS & GEMS
Harold's Times Tables Cheat Sheet	Docx	Multiplication patterns, 12 x 12, and 25 x 25 times tables practice sheets
Harold's Prime Numbers Cheat Sheet	Docx	Prime numbers

BarCharts QuickStudy Guide
Math: Kindergarten
Math: 1st Grade
Math: 2nd Grade
Math: 3rd Grade
Math: 4th Grade
Math: 5th Grade
Math: 6th Grade
Math: 7th Grade
Math: 8th Grade

Khan Academy
Pre-K		8 Units of practice problems
Kindergarten		3 Units of practice problems
1st Grade		3 Units of practice problems
2nd Grade		8 Units of practice problems
3rd Grade		14 Units of practice problems
4th Grade		14 Units of practice problems
5th Grade		16 Units of practice problems
6th Grade		12 Units of practice problems
7th Grade		9 Units of practice problems
8th Grade		7 Units of practice problems

Textbooks
Prealgebra 2e	Link	OpenStax free open-source textbook - Prealgebra

Worksheets
Common Core		Common Core lists and worksheets adopted by most USA states for K-10

Links
WolframAlpha.com		Computational Knowledge Engine
Wikipedia.org		The Free Encyclopedia that anyone can edit

iPad Apps		Apple's App Store
WolframAlpha		The Google of Mathematics
Math Ref		Best Math, Physics, and Chemistry Formulas