The Eclectic Manual of Methods by Van Antwerp, Bragg and Co. The Eclectic Manual by Van Antwerp, Bragg and Co.    

Lesson 20: Mentally Add and Subtract Numbers Up to 3

Directions

In this phase, do not mention objects. Lessons must be entirely oral.

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

Teach children to mentally combine and separate numbers up to 3.

• Ask children to call out the answer to questions such as, 'How many are 2 and 1? How many are 3 less 1?'
• Master the operations in the table below (vary the order of questions):