Doubling Mosaics: More Number Patterns

Marlo the chameleon mosaic artist opens with a Number Talk (20 × 3, 21 × 3, 40 × 3, 42 × 3), then students fill in tables for adding 15 and for doubling. They spot features the rule never states, like a ones digit that goes 5, 0, 5, 0, use them to decide whether 250 can be in a pattern, and compare two doubling lists to see that one is 10 times the other. Every direction is narrated, and wrong answers get a spoken hint. About 14 minutes, Grade 4.

• 14 narrated activity scenes
• A Number Talk on a digit pad
• Pattern tables to fill in, with spoken hints

• Fill in tables for number patterns that add the same number or double each time.
• Notice features a rule doesn't state, like a ones digit that goes 5, 0, 5, 0.
• Use a feature to decide whether a number can be in a pattern.
• Compare two doubling patterns and explain how they are related.