This 2.MD.3 common core activity is a hands-on estimate and measure station for 2nd and 3rd grade, with true-size cards, paper rulers and a practice page. Answer key included.

This finding the perimeter activity for 3rd and 4th grade has students find missing sides and match 12 shapes to their perimeters. Answer key included, so checking is quick.

This area and perimeter pirate activity has 3rd to 5th graders solve rectangle cards and match each pirate to the ship with the right answer and units. Answer key included.

These ones, tens, hundreds, thousands, ten thousands place value flash cards for 2nd to 5th grade ask students to name the value of an underlined digit. Answer key included.

This Sweet Summer Treats money addition activity has 1st and 2nd grade students count coins and match them to treat prices, then add two prices. A practice page and answer key are included.

This temperature actions worksheet helps 3rd grade students match hot and cold temperatures to the right activities, then solve a snowy-day story problem. An answer key is included for quick checking.

This skip count by nine worksheet has 3rd graders fill in number patterns that count by nines and solve story problems about groups of nine. An answer key is included for quick, easy checking.

This skip count by four worksheet has 3rd graders fill in number patterns that count by fours and solve story problems about groups of four. An answer key is included for quick, easy checking.

This using a graph to gather information worksheet helps 3rd grade students read a farm animal bar graph scaled by fives and solve compare and two-step questions. An answer key is included for quick, easy checking.

This weight classification worksheet has 3rd grade students sort objects into heavy and light columns, then find the heavy and light things in sentences. An answer key makes checking quick and easy.

This skip count by eight worksheet has 3rd graders fill in number patterns that count by eights and solve story problems about groups of eight. An answer key is included for quick, easy checking.

This measuring length in inches worksheet has 3rd graders read a quarter-inch ruler to measure three true-size objects and draw a line of a given length. An answer key is included for fast checking.

This tens place value worksheet helps 3rd grade students name what a tens digit is worth, with number items, write-your-own challenges, word problems and an answer key.

This division fast facts worksheet helps 3rd grade students build quick recall of division facts, then compare quotients with greater than, less than, and equal. Includes an answer key for easy checking.

This temperature word search worksheet has 3rd grade students find six hot and cold words, then match each word to its meaning. An answer key is included for quick checking.

Practice with this three digit addition worksheet, where every problem regroups. Six column problems and three word problems for 3rd grade, with an answer key, build accuracy that lasts.

This minute elapsed time worksheet gives 3rd graders eight start-to-end intervals that regroup across the hour plus two story problems. Answer key included for quick, no-prep practice telling time to the minute.

This Elapsed Time Quarter Hour Worksheet helps 3rd Grade students read start and end clocks, solve time word problems, and explain their thinking. An answer key is included, so checking work takes seconds.

Using the Adding 13 Song (Lyric Mjusic Video), students sing and practice adding 13 with all addition facts 1-15. Your kids will learn how to add 13.

Using the Adding 13 Song (MP3), students sing and practice adding 13 with all addition facts 1-15. Your kids will learn how to add 13.