Mathematics
Remember?
3 quick questions from earlier weeks · about 3 minutes
- 6 + 9 = ? Facts to 20
- A red ribbon is 45 feet. A blue ribbon is 22 feet. How much longer is the red ribbon? Week 21
- Which tool would you use to measure a door: a ruler or a tape measure? Week 19
Objective: Students will build a number line with equally spaced points and locate whole numbers on it (2.MD.B.6).
- 10 min — Warm-Up: Lay a ruler on the table and ask your child to point to 4, then 9, then 12, and to explain how they knew where 9 was (count the marks, or 'one before 10'). Ask: 'What is the same about a ruler and a number line?'
- 15 min — Mini-Lesson: A Ruler Is a Number Line: Together, tape a 24-inch strip of paper to the floor and use the ruler to mark and label every inch from 0 to 20 so the spaces are all equal. Explain that 0 is where we start, each hop is one unit, and the numbers must be the same distance apart. Have your child place a paper clip on 7, a bean on 13, and a coin on 18, checking by counting hops from 0.
- 15 min — Practice: Where Does It Go?: On paper, your child draws a number line from 0 to 20 with tick marks 1 centimeter apart using the ruler, then places dots for 3, 8, 11, 15, and 19 and labels them. Next they draw a second line from 0 to 100 marked by tens and place 30, 70, and 90. Support: give them a pre-drawn line with only 0, 10, and 20 labeled. Stretch: on the 0 to 100 line, estimate where 45 and 82 belong.
- 5 min — Wrap-Up: Ask: 'Why do the spaces on a number line have to be equal?' Your child writes 'A number line is like a ruler with equal spaces' in their journal.
Materials: ruler, paper strip 24 inches long, masking tape, marker, paper clip, dried bean, coin, paper, math journal, pencil