Sembl · Number line

Task library

Eighteen standards-aligned Peg tasks, Grades 1 to 6. Each begins with a single benchmark; the Drop unlocks after a couple of cards land.

Grade 1

1.NBT.B.3

Filling in the teens

8 min

Compare two two-digit numbers based on meanings of the tens and ones digits, recording the results of comparisons with the symbols >, =, and <.

Cards students place (4)
512178
Starts with
0
Drops reveal
20, 10
PresentPlanUnscored

Grade 2

2.MD.B.6 · 2.NBT.A.1

Landmarks to 100

10 min

Represent whole numbers as lengths from 0 on a number line diagram with equally spaced points corresponding to the numbers 0, 1, 2, ..., and represent whole-number sums and differences within 100 on a number line diagram.

Cards students place (5)
3045609015
Starts with
0
Drops reveal
100, 50, 25
2.MD.B.6

Where do these live?

10 min

Represent whole numbers as lengths from 0 on a number line diagram with equally spaced points corresponding to the numbers 0, 1, 2, ..., and represent whole-number sums and differences within 100 on a number line diagram.

Cards students place (4)
20456585
Starts with
0
Drops reveal
100, 30, 70
2.NBT.A.1

Counting in the hundreds

10 min

Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones.

Cards students place (4)
150300400450
Starts with
0
Drops reveal
500, 250, 100

Grade 3

3.NF.A.2 · 3.NF.A.3.c

Where do the fourths go?

12 min

Understand a fraction as a number on the number line; represent fractions on a number line diagram.

Cards students place (5)
1/43/41/32/34/4
Starts with
0
Drops reveal
1, 1/2
3.NF.A.2 · 3.NF.A.3.b

Eighths and their friends

12 min

Understand a fraction as a number on the number line; represent fractions on a number line diagram.

Cards students place (5)
1/83/85/87/84/8
Starts with
0
Drops reveal
1, 1/2, 1/4
3.NF.A.2 · 3.NF.A.3.b

Thirds and sixths

12 min

Understand a fraction as a number on the number line; represent fractions on a number line diagram.

Cards students place (5)
1/32/31/65/63/6
Starts with
0
Drops reveal
1, 1/2
3.NF.A.2

Past the whole

12 min

Understand a fraction as a number on the number line; represent fractions on a number line diagram.

Cards students place (5)
1/41/25/47/43/4
Starts with
0
Drops reveal
1, 2, 3/2
3.NBT.A.1

Rounding rehearsal: 0 to 1000

10 min

Use place value understanding to round whole numbers to the nearest 10 or 100.

Cards students place (5)
250480700900150
Starts with
0
Drops reveal
1000, 500, 750

Grade 4

4.NF.A.2

Bigger or smaller than a half?

12 min

Compare two fractions with different numerators and different denominators, e.g., by creating common denominators or numerators, or by comparing to a benchmark fraction such as 1/2. Recognize that comparisons are valid only when the two fractions refer to the same whole. Record the results of comparisons with symbols >, =, or <, and justify the conclusions, e.g., by using a visual fraction model.

Cards students place (5)
2/33/85/62/51/4
Starts with
0
Drops reveal
1, 1/2
4.NF.C.6

Decimals on the line

12 min

Use decimal notation for fractions with denominators 10 or 100. For example, rewrite 0.62 as 62/100; describe a length as 0.62 meters; locate 0.62 on a number line diagram.

Cards students place (5)
0.30.620.90.050.45
Starts with
0
Drops reveal
1, 0.5, 0.25
4.NF.C.7

Does more digits mean bigger?

12 min

Compare two decimals to hundredths by reasoning about their size. Recognize that comparisons are valid only when the two decimals refer to the same whole. Record the results of comparisons with the symbols >, =, or <, and justify the conclusions, e.g., by using a visual model.

Cards students place (5)
0.40.450.050.540.7
Starts with
0
Drops reveal
1, 0.5
4.NF.B.3

Mixed numbers on the line

12 min

Understand a fraction a/b with a > 1 as a sum of fractions 1/b.

Cards students place (5)
1/25/47/39/411/4
Starts with
0
Drops reveal
1, 2, 3, 1 1/2

Grade 5

5.NBT.A.3

Down to thousandths

12 min

Read, write, and compare decimals to thousandths.

Cards students place (5)
0.1250.3750.70.050.875
Starts with
0
Drops reveal
1, 0.5, 0.25
5.NBT.A.3

Zooming into the tenths

10 min

Read, write, and compare decimals to thousandths.

Cards students place (5)
0.320.370.3550.310.39
Starts with
0.3
Drops reveal
0.4, 0.35
5.NBT.A.3 · 4.NF.C.6

Fractions and decimals together

12 min

Read, write, and compare decimals to thousandths.

Cards students place (5)
1/40.33/53/40.9
Starts with
0
Drops reveal
1, 0.5

Grade 6

6.NS.C.6.c

Into the negatives

12 min

Find and position integers and other rational numbers on a horizontal or vertical number line diagram; find and position pairs of integers and other rational numbers on a coordinate plane.

Cards students place (5)
-7-348-6
Starts with
0
Drops reveal
10, -10, 5, -5
6.NS.C.7.c

Same distance from zero

12 min

Understand the absolute value of a rational number as its distance from 0 on the number line; interpret absolute value as magnitude for a positive or negative quantity in a real-world situation.

Cards students place (5)
-55-33-6
Starts with
0
Drops reveal
8, -8, 4, -4