What is color by code?

Instead of numbers, each space shows a code of its color, and the key gives each color's code. Choose it in the "Color by number" card, "In the spaces":

• Numbers: 1, 2, 3, the classic.
• Capital letters: A, B, C, learning the alphabet.
• Small letters: a, b, c, learning the alphabet.
• Sight words: the, and, look, first words to read (Dolch lists, English).
• Adding within 10: 3 + 4, each sum is a color.
• Adding within 20: 12 + 7, each sum is a color.
• Taking away within 10: 9 − 4, never below zero.
• Taking away within 20: 17 − 8, never below zero.
• Times tables to 5: 3 × 4, each product is a color.
• Times tables to 10: 7 × 8, each product is a color.
• Dividing, tables to 5: 20 ÷ 4, whole answers only.
• Dividing, tables to 10: 63 ÷ 9, whole answers only.
• Shapes: a star, a heart, a circle, for children who cannot read yet. The code applies to every page of the book.