This 1.G.1 First Grade Common Core Lesson teaches us that shapes can be put into many different categories.

In this 4.G.1 Fourth Grade Common Core Lesson, students identify points, lines, line segments, rays, angles, perpendicular and parallel lines.

In this 5.G.3 Fifth Grade Common Core Lesson, students understand that attributes belonging to a category of two-dimensional figures also belong to all subcategories of that category.

This stocking sort classifying activity has PreK-1st grade students sort holiday picture cards into toy, food and clothes stockings, plus a practice page. Answer key included.

This comparing shapes sorting activity has kindergarten and 1st grade children sort 12 object picture cards by the solid shape they look like. Answer key included for easy checking.

This sorting addition equations worksheet has 1st grade students solve twelve addition facts, sort them by sum, and find missing addends. An answer key is included for quick checking.

Using this Find the Groups Grouping Activity, students place picture objects in the most appropriate category based on where it fits best.

Using this K.MD.1 Kindergarten Common Core Lesson, students sort objects into short and tall categories to learn about measurement.

Using this Short and Long Vowel E Activity, students sort the short and long vowel E word cards.

Using Dr. Seuss Shapes Worksheet, students cut out shapes in order to sort and compare them based on the Dr. Seuss book, The Shape of Me and Other Stuff.

This sort it organizing shapes activity has students sort 24 shape cards by rules like equal sides, right angles and parallel sides. Made for 3rd to 5th grade, with a practice page and answer key included.

This vowel letter a activity gives kindergarten to 2nd grade readers 12 picture cards to sort by the short a or long a sound, plus an under the sea sort mat and a practice page. Answer key included.

Using this K.MD.3 Kindergarten Common Core Lesson, students sort objects into categories in order to find similarities between objects.

Using Star Alphabet Matching Activity, students matching uppercase and lowercase letters to build letter recognition skills.

Using this L.K.5 Common Core Activity, students place picture objects in the most appropriate category based on where it fits best.

Using this Battle Shape Battleship Activity, students classify two-dimensional figures by their properties by playing a game of Battle Shape (a geometrical rendition of Battleship).

Using this K.G.4 Kindergarten Common Core Lesson, students analyze and compare two- and three-dimensional shapes by sorting them into similar groups.