Ray's New Primary Arithmetic by Joseph Ray Ray's New Primary Arithmetic by Joseph Ray    

Lesson 16: Review - Add Three Numbers Up to 20

Directions

Follow the step-by-step instructions below to teach the lesson.

Progress to the next lesson when children master the current lesson.

Value mastery over speed of progression.

Steps

STEP 1

• Have children use physical objects to demonstrate and solve the below review exercises, such as marbles, toys, or beans.
• The objects should be arranged in distinct groups to represent each number indicated.

STEP 2

• Assess mastery by reading aloud the listed problems and having the children mentally compute and recite the solutions.
• If children have difficulties, work with physical objects again and then reassess.