Richmond.edu/OpenWideLookInside

Best Books For Learning Addition
The Hershey’s Kisses Addition Book by Jerry Pallotta
The Hershey’s Kisses Subtraction Book by Jerry Pallotta
The Mission of Addition by Brian P. Cleary
The Action of Subtraction by Brian P. Cleary
The M&M’s Addition Book by Barbara Barbieri McGrath

CoolMath4Kids.com
Lesson 1: How Addition Works
Lesson 2: Yardstick Arithmetic

Lesson 3: Place Value Review
Lesson 4: Two Digit Addition
Lesson 5: Two Digit Addition (regrouping)
Lesson 6: Three Digit Addition
Lesson 7: Scratch Addition

MathCats.com
From simple to difficult word problems
MathIsFun.com
Understanding addition*
Understanding the concept of subtraction
FunBrain
Tic Tac Toe (play against the computer)
AAAStudy.com(addition)
AAAStudy.com (subtraction)

Worksheets
Kidzones
simple to hard addition worksheets
Simple to Hard Subtraction

KidsNumbers.com
Prepare and the practice
Addition
Subtraction

NLVM.usu.edu
Use columns and manipulatives to learn addition