What this lesson shows
Fixes a mistake
Four parts that are not equal are not fourths.
The worked example
The lesson works this one step by step: 1/4. Then your kid tries one like it on paper.
The steps
- Count the parts
- Check they are equal
- Equal parts fill the whole
Helping at home
Before naming a fraction, check that every part is the same size. If the parts are not equal, the shaded part is not 1 of that many equal parts, so it has no fraction name yet.
If your kid gets stuck
Are all the parts the same size?
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