What this lesson shows
Fold a rectangle and a circle into 2 equal parts, then 4: halves, then fourths.
The worked example
The lesson works this one step by step: rectangle (question 1). Then your kid tries one like it on paper.
The steps
- Fold once: halves
- Fold again: fourths
- More parts, smaller parts
Helping at home
Fold paper shapes: once makes 2 equal parts, halves; twice makes 4 equal parts, fourths. More parts means smaller parts.
If your kid gets stuck
Are 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 1.G.A.3
Partition circles and rectangles into two and four equal shares, describe the shares using the words halves, fourths, and quarters, and use the phrases half of, fourth of, and quarter of. Describe the whole as two of, or four of the shares. Understand for these examples that decomposing into more equal shares creates smaller shares.
Matches standards in 50 statesSee each state's code
- Alabama MA19.1.23a, MA19.1.23b
- Alaska 1.G.3
- Arizona 1.G.A.3
- Arkansas 1.NPV.8
- California 1.G.A.3
- Colorado 1.G.A.3
- Connecticut 1.G.A.3
- Delaware 1.G.A.3
- District of Columbia 1.G.A.3
- Florida MA.1.FR.1.1
- Georgia 1.GSR.4.3
- Hawaii 1.G.A.3
- Idaho 1.G.A.3.a, 1.G.A.3.b
- Illinois 1.G.A.3
- Indiana 1.G.3
- Iowa 1.G.A.3
- Kansas 1.G.3
- Kentucky KY.1.G.3
- Louisiana 1.G.A.3
- Maine 1.G.A.3
- Maryland 1.NOS.F.14
- Massachusetts 1.G.A.3
- Michigan 1.G.A.3
- Mississippi 1.G.3
- Missouri 1.GM.A.4
- Montana MT.1.G.4
- Nebraska 1.G.1.d
- Nevada 1.G.A.3
- New Hampshire 1.G.A.3
- New Jersey 1.G.A.3
- New Mexico 1.G.A.3
- New York NY-1.G.3
- North Carolina NC.1.G.3.a, NC.1.G.3.b, NC.1.G.3.c
- North Dakota 1.NO.NF.1, 2.NO.NF.3
- Ohio 1.G.3
- Oklahoma 1.N.3.1
- Oregon 1.GM.A.3
- Pennsylvania CC.2.3.1.A.2
- Rhode Island 1.G.A.3
- South Carolina 1.NR.4.1, 2.NR.4.2
- South Dakota 1.G.A.3
- Tennessee 1.G.A.3
- Texas 111.3.b.6.G, 111.3.b.6.H
- Utah 1.G.3
- Vermont 1.G.A.3
- Virginia 1.NS.3a, 1.NS.3b, 1.NS.3c
- Washington 1.G.A.3
- West Virginia M.1.22
- Wisconsin M.1.G.A.3
- Wyoming 1.G.3a, 1.G.3b, 1.G.3c, 1.GP.3.A, 1.GP.3.B, 1.GP.3.C