Weekly Reader Connections

Teacher Guide: Lesson 22.4

The Weekly Reader Connection feature provides children with additional practice of the skills taught in the Curriculum Connection feature in their student books.

Tell children that a person who lived in China or in the Middle East long ago might have used a counting board to count, add, and subtract. Emphasize that people still use counting boards today to do math.

The A Counting Board activity displays a counting board that represents the place value of hundreds, tens, and ones. The number 52 is shown on the model with 5 (red) beads for the tens and 2 (blue) beads for the ones. Explain that numbers greater than 52 could be shown on this counting board because there are more tens and ones beads on the other side of the counting board, the side we cannot see.

Explain that to show a number less than 52 on the pictured counting board, we would have to slide some beads over to the other side—the side we cannot see.

Houghton Mifflin Math Grade 1