The Decimal Games  A selfcontained package of computer games. 
Frequently asked questions about teaching decimals 
Evidence that even a little bit of targeted teaching will help. 
Teaching models with activities:
Advice on Choosing a Model
Linear Arithmetic Blocks (LAB)
Multibase Arithmetic Blocks (MAB)
Number Expanders
Number Slides

Diagnosing misconceptions:
Decimal Comparison Tests
Decimal Skip Counting
Stickers Game
Scale Reading
Making Numbers

Connecting decimals, whole numbers and fractions:
Number Trails
Number Lines
DecimAliens Game 
Appreciating the density of decimals:
Number Between Game
DecimalLine Game 
Learning to order decimals:
Long Line of Blocks
Hidden Numbers Game

Developing estimation skills:
Moving Closer
Flying Photographer Game

Promoting class discussion:
Marking Homework
Canteen Prices
Rounding/Significant Figures
Funny Numbers
Powers of Ten
Area Cards 
Decimal operations:
Teaching Operations  Summary
Multiplying & Dividing by Powers
of 10
Multiplication using Area Model
Aliens Calculator Games
Martian Numbers  Extension
Tests of Basic Skills
