What this lesson shows
Fixes a mistake
A ruler has small marks between its numbers. A crayon from 0 to 3 is 3 inches, not one inch for every mark.
The worked example
The lesson works this one step by step: 0 to 3 inches. Then your kid tries one like it on paper.
The steps
- Small marks split an inch
- An inch is number to number
- Count the inches
Helping at home
The small marks split each inch into parts. Count the spaces from one number to the next: each is 1 inch.
If your kid gets stuck
Count from number to number.
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.1
Measure the length of an object by selecting and using appropriate tools such as rulers, yardsticks, meter sticks, and measuring tapes.
Matches a standard in all 50 states and DCSee each state's code
- Alabama MA19.2.17, MA19.2.19, MA19.2.20
- Alaska 2.MD.1, 2.MD.3, 2.MD.4
- Arizona 2.MD.A.1
- Arkansas 2.GM.3
- California 2.MD.A.1
- Colorado 2.MD.A.1
- Connecticut 2.MD.A.1
- Delaware 2.MD.A.1
- District of Columbia 2.MD.A.1
- Florida MA.2.M.1.1, MA.2.M.1.2
- Georgia 2.MDR.5.1, 2.MDR.5.2
- Hawaii 2.MD.A.1
- Idaho 2.MD.A.1
- Illinois 2.MD.A.1
- Indiana 2.M.2
- Iowa 2.MD.A.1
- Kansas 2.MD.1, 2.MD.4
- Kentucky KY.2.MD.1
- Louisiana 2.MD.A.1
- Maine 2.MD.A.1
- Maryland 2.GR.A.1
- Massachusetts 2.MD.A.1
- Michigan 2.MD.A.1
- Minnesota 2.3.2.2
- Mississippi 2.MD.1
- Missouri 2.GM.B.4, 2.GM.B.7
- Montana MT.2.MD.1, MT.2.MD.3
- Nebraska 2.G.2.b, 2.G.3.a, 2.G.3.b
- Nevada 2.MD.A.1
- New Hampshire 2.MD.A.1
- New Jersey 2.M.A.1
- New Mexico 2.MD.A.1
- New York NY-2.MD.1
- North Carolina NC.2.MD.1, NC.2.MD.3, NC.3.MD.2.a
- North Dakota 2.GM.M.2
- Ohio 2.MD.1
- 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.7
- Pennsylvania CC.2.4.2.A.1
- Rhode Island 2.MD.A.1
- South Carolina 2.MGSR.1.1, 3.MGSR.2.4
- South Dakota 2.MD.A.1
- Tennessee 2.MD.A.1, 2.MD.A.3, 2.MD.A.4
- Texas 111.4.b.9.A, 111.4.b.9.D
- Utah 2.MD.1, 2.MD.4
- Vermont 2.MD.A.1
- Virginia 2.MG.1a.i, 2.MG.1b.i, 3.MG.1b.i
- Washington 2.MD.A.1
- West Virginia M.2.15
- Wisconsin M.2.MD.A.1
- Wyoming 2.MD.1