Scholastic
Scholastic: Max's Math Adventures: Farmer Fred's Counting Farm
Add and rhyme with Farmer Fred, then use the activity sheet to work through some more farm addition. The teacher's guide and extra challenges will be helpful in lesson planning.
Math Is Fun
Math Is Fun: Word Questions: Elementary Addition
Work against a timer as you test your ability to add and to solve word problems. Use number-line clue for help and score points. Fun activity for individuals, small groups, on an entire class.
Math Drills
Math Drills: Addition Worksheets
Download these worksheets to sharpen your addition skills. Sheets focus on single and multi-digit addition, addition table, column addition, and adding doubles of numbers.
ClassFlow
Class Flow: Number Sense
[Free Registration/Login Required] This flipchart allows first graders to practice addition situations using story problems.