This globe-trotting set of task cards will help your kids build a stronger understanding of rounding whole numbers while teaching them facts about the world’s rivers, mountains, oceans, and more! The 32 task cards, 2 journal inserts, and 3 activity sheets in this set are the perfect tools for helping your students practice rounding whole numbers through the ten thousands place.
Common Core State Standards for Mathematics addressed:
Numbers and Operations in Base Ten (4.NBT)
Generalize place value understanding for multi-digit whole numbers.
• Use place value understanding to round multi-digit numbers to any place. (4.NBT.3)
• 2 graphic reference sheets
• 32 task cards
• answer sheet and key
• three one-page activity sheets (scoring guides included)
The 32 cards each present the students with a geographic fact that involves a multi-digit number – the height of a waterfall, the length of a river, the elevation of a mountain, etc. Students are asked to round the given measurement to a specific place. Some of the cards require the students to round to the highest place, while other cards use a place other than the highest one. None of the numbers are larger than 5 digits in length.
The first sixteen cards present students with a number line to help guide their thinking as they round the numbers. The endpoints of the number lines match the place to which the number has to be rounded. The midpoint of the number lines are marked but not labeled, so part of the work the students will have to do is determine the mid-number of the number line. Once they do that, rounding the number will be simple!
The second half of the set – cards 17-32 – do not feature number lines. For these, students will have to draw their own number lines, forcing them to think about what endpoints should be used to round to the given place. When I had my own students use these cards, it was interesting to watch as they transitioned from the cards with number lines to the ones without number lines. After seeing the various number lines on the first 16 cards, they were easily able to draw their own number lines in their math journal, and their level of proficiency with creating number lines showed me not only whether they were able to round, but their understanding of number relationships as well.
The printables consist of two graphic reference sheet and three different one-page worksheets. One of the graphic reference sheets describes rounding and demonstrates how number lines can be used to round numbers to the highest and non-highest places. The other reference sheet explains what to do with numbers that fall right in the middle of two round numbers. Before you have your students complete the cards, you can have them glue the reference sheets in their journals.
The first of the two reference sheets is full-size. When I give students sheets of this size, I sometimes have them fold it in half and glue it across two pages of the journal, allowing it to fold open when they open their journal; alternatively, they may fold it in half and glue one half down on one journal page, folding open the sheet when they need to read it. The other reference sheet fits two on a page, so one can fit easily on one page of a journal or notebook. Your students can use the journal inserts as guides while they work on the cards, as well as when they complete other tasks that relate to rounding.
The three provided activity sheets can be used to evaluate student understanding of rounding. The first two sheets are formatted similarly, and have similar types of questions, though the numbers on each are different. You can use these activity pages in a variety of ways. You could give one as a pre-test, then teach your lesson and allow students to practice with the task cards, and then give the second worksheet as an independent post-test. You could also have the students work on the task cards, then complete one of the activity sheets as guided practice with yourself, a partner, or a small group, and then give the second activity sheet as an independent assessment. The paired sheets could also be given as homework, center assignments, or any other purpose that fits your teaching style or classroom routines.
The third activity sheet requires students to show their thinking through the use of a number line as well as a written response. This activity sheet is designed to assess how your students are able to communicate their understanding of rounding.
All activity sheets include scoring guides for clear, easy grading!
Looking for more challenging resources to extend your students' understanding of rounding? Check out Rounding the World (Set B)
, a set of 32 task cards, reference sheets, and assessment activities that are all different from this materials in this set.
I hope your students enjoy these resources and are able to build their understanding of rounding. – Dennis McDonald