My 3rd graders have been working on putting double digit numbers on a number line and the next step is using that knowledge to round numbers to the nearest ten.
I know there are a lot of rhymes out there "5 or above, give it a shove, 4 or below, let it go" but they never seem to stick with my kids. To read more about my feelings on these rhymes, check out THIS post that has more details about rounding on a number line. They memorize the rhyme wrong or apply it incorrectly and, without a solid understanding of a number line and what rounding numbers really means they don't notice that their answers are unreasonable.
I will admit, for 3/5 of my 3rd graders this activity really clicked for them and they were really understanding numbers in the grand scheme of a number line to 100. For 2/5 of my third graders, being outside was just too plain stimulating and the bugs were too interesting to focus on math! Overall, I was pleased with this kinesthetic approach to rounding!
My kids will continue to practice and solidify their understanding with a number line activity from a pirate math pack I made last year. I swear, math centers are a life saver when it comes to additional practice and skill fluency!!
If you would like to learn more about using a number line to round, check out this step by step set of rounding activities. Your students will be rounding to the nearest ten with the foundation to take on larger numbers in no time!