What this lesson shows
Guess a length from things we know, such as a paper clip is about an inch, then measure and see how close.
The worked example
The lesson works this one step by step: crayon (question 1). Then your kid tries one like it on paper.
The steps
- Clip: about 1 inch
- Fingertip: about 1 centimeter
- Ruler: 1 foot. Big step: about 1 meter
- Guess, then measure
Helping at home
Guess first with things you know: a paper clip is about 1 inch, a fingertip about 1 centimeter, a ruler 1 foot, a big step about 1 meter. Then measure and see how close the guess was. Close is good.
If your kid gets stuck
What do you know that is about that long?
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 2.MD.A.3
Estimate lengths using units of inches, feet, centimeters, and meters.
Matches standards in 49 statesSee each state's code
- Alabama MA19.2.17, MA19.2.19
- Alaska 2.MD.3
- Arizona 2.MD.A.3
- Arkansas 2.GM.3
- California 2.MD.A.3
- Colorado 2.MD.A.3
- Connecticut 2.MD.A.3
- Delaware 2.MD.A.3
- District of Columbia 2.MD.A.3
- Florida MA.2.M.1.1
- Georgia 2.MDR.5.2
- Hawaii 2.MD.A.3
- Idaho 2.MD.A.3
- Illinois 2.MD.A.3
- Indiana 2.M.2
- Iowa 2.MD.A.3
- Kansas 2.MD.3
- Kentucky KY.2.MD.3
- Louisiana 2.MD.A.3
- Maine 2.MD.A.3
- Maryland 2.GR.A.1, 2.GR.A.3
- Massachusetts 2.MD.A.3
- Michigan 2.MD.A.3
- Minnesota 2.3.2.2
- Mississippi 2.MD.3
- Missouri 2.GM.B.4, 2.GM.B.6
- Montana MT.2.MD.3
- Nebraska 2.G.3.a, 2.G.3.b
- Nevada 2.MD.A.3
- New Hampshire 2.MD.A.3
- New Jersey 2.M.A.3
- New Mexico 2.MD.A.3
- New York NY-2.MD.3
- North Carolina NC.2.MD.3, NC.3.MD.2.a
- Ohio 2.MD.3
- Oklahoma 2.GM.2.2, 3.GM.2.5, 3.GM.2.6, 5.GM.3.5
- Oregon 2.GM.B.4, 2.GM.B.6
- Pennsylvania CC.2.4.2.A.1
- Rhode Island 2.MD.A.3
- South Carolina 2.MGSR.1.1, 3.MGSR.2.4
- South Dakota 2.MD.A.3
- Tennessee 2.MD.A.3
- Texas 111.4.b.9.A, 111.4.b.9.D, 111.4.b.9.E
- Utah 2.MD.3
- Vermont 2.MD.A.3
- Virginia 2.MG.1a.i, 2.MG.1b.i, 3.MG.1b.i, 3.MG.1c
- Washington 2.MD.A.3
- West Virginia M.2.17
- Wisconsin M.2.MD.A.3