What this lesson shows
1/4 as part of a shape, part of a set, and a point on a number line.
The worked example
The lesson works this one step by step: 1/4. Then your kid tries one like it on paper.
The steps
- Cut into equal parts
- Shade one part
- Part of a set
- A point on the line
Helping at home
The bottom number says how many equal parts make the whole; the top says how many we take. Cut the bar into that many equal parts, make a set with that many circles, and cut the line from 0 to 1 the same way.
If your kid gets stuck
How many equal parts make the whole?
Watch it with Lux
With Lux, this lesson is a narrated video and a printed page your kid works on. Then Lux helps with the same math on their own worksheet, one question at a time.
Standards
- Common Core 3.NF.A.1
Understand a fraction 1/b as the quantity formed by 1 part when a whole is partitioned into b equal parts; understand a fraction a/b as the quantity formed by a parts of size 1/b. - Common Core 3.G.A.2
Partition shapes into parts with equal areas. Express the area of each part as a unit fraction of the whole. For example, partition a shape into 4 parts with equal area, and describe the area of each part as 1/4 of the area of the shape.
Matches a standard in all 50 states and DCSee each state's code
- Alabama MA19.3.13
- Alaska 3.NF.1, 3.G.2
- Arizona 3.NF.A.1, 3.NF.A.2.c, 3.G.A.2
- Arkansas 3.NPV.6, 3.NPV.10, 3.NPV.7
- California 3.NF.A.1, 3.G.A.2
- Colorado 3.NF.A.1, 3.G.A.2
- Connecticut 3.NF.A.1, 3.G.A.2
- Delaware 3.NF.A.1, 3.G.A.2
- District of Columbia 3.NF.A.1, 3.G.A.2
- Florida MA.3.FR.1.1, MA.3.FR.1.2, MA.3.FR.1.3
- Georgia 3.NR.4.1, 3.NR.4.3
- Hawaii 3.NF.A.1, 3.G.A.2
- Idaho 3.NF.A.1, 3.G.A.2
- Illinois 3.NF.A.1, 3.G.A.2
- Indiana 4.NS.2, 5.NS.2, 3.NS.2, 3.G.3
- Iowa 3.NF.A.1, 3.G.A.2
- Kansas 3.NF.1, 3.G.2
- Kentucky KY.3.NF.1, KY.3.G.2
- Louisiana 3.NF.A.1, 3.G.A.2
- Maine 3.NF.A.1, 3.G.A.2
- Maryland 3.NOS.F.10.b, 3.NOS.F.11, 3.NOS.F.10.a
- Massachusetts 3.NF.A.1, 3.G.A.2
- Michigan 3.NF.A.1, 3.G.A.2
- Minnesota 3.1.3.1
- Mississippi 3.NF.1, 3.G.2
- Missouri 3.NF.A.1, 3.NF.A.2.a, 3.NF.A.2.b, 3.GM.A.3
- Montana MT.3.NF.1, MT.3.G.2
- Nebraska 3.N.2.b, 3.N.2.a
- Nevada 3.NF.A.1, 3.G.A.2
- New Hampshire 3.NF.A.1, 3.G.A.2
- New Jersey 3.NF.A.1, 3.G.A.2
- New Mexico 3.NF.A.1, 3.G.A.2
- New York NY-3.NF.1, NY-3.G.2
- North Carolina NC.3.NF.1.a, NC.3.NF.1.b, NC.3.NF.2.a
- North Dakota 3.NO.NF.1
- Ohio 3.NF.1, 3.G.2
- Oklahoma 3.N.3.1, 3.N.3.2, 3.N.3.3
- Oregon 3.NF.A.1, 3.GM.A.2
- Pennsylvania CC.2.1.3.C.1, CC.2.3.3.A.2
- Rhode Island 3.NF.A.1, 3.G.A.2
- South Carolina 3.NR.2.2, 3.NR.2.4, 3.NR.2.1
- South Dakota 3.NF.A.1, 3.G.A.2
- Tennessee 3.NF.A.1, 3.G.A.2
- Texas 111.4.b.3.C, 111.5.b.3.A, 111.5.b.3.C, 111.5.b.3.D, 111.5.b.3.E, 111.6.b.3.A, 111.5.b.6.E
- Utah 3.NF.1.a, 3.NF.1.b, 3.G.2
- Vermont 3.NF.A.1, 3.G.A.2
- Virginia 2.NS.3d, 2.NS.3e.i, 2.NS.3e.iii, 3.NS.3a.i, 3.NS.3a.iii, 3.NS.3b, 3.NS.3c, 2.NS.3c
- Washington 3.NF.A.1, 3.G.A.2
- West Virginia M.3.15, M.3.27
- Wisconsin M.3.NF.A.1, M.3.G.A.2
- Wyoming 3.NF.1