Curated OER
Triangles
This unit enables scholars to apply the rule for area of a triangle (area equals half base times height). They practice multiplication and division strategies as they calculate areas.
Curated OER
Rep Tiles
Third graders use pattern blocks of one shape at a time to try to create a similar shape. They compare the perimeter of the new figure with the perimeter of the original shape and look for a pattern. Students use the pattern to predict...
Pennsylvania Department of Education
Making Cubes
Third graders explore vocabulary associated with three dimensional figures. In this transformations lesson, 3rd graders create two dimensional nets for three dimensional figures. Students become familiar with describing two and three...
Curated OER
Geoboard Squares
Students create squares of different sizes on a geoboard. They find and describe a pattern. Students use the pattern to determine the number of squares possible on a 10-by-10 geoboard. They create squares with a horizontal base (and...
Curated OER
Word Problems
Here is a very nice resource that presents 12 math word problems suitable for third and fourth graders. All four of the basic operations are used in these one-step problems. An answer key is provided on page two. This would make a very...
Curated OER
Finding the Area of Polygons
Third graders are exposed to finding the area of polygons by decomposing figures and recomposing them into rectangles. This strategy allows children to expand on their prior knowledge of constructing shapes by rearranging parts into...
Curated OER
Factors
Practice factoring numbers by using graph paper, manipulatives and computer applets.
Curated OER
Alfy plays "Time Flies"
Third graders use the Internet to go to a math web site to explore, practice and play time telling exercises. They play a time game by moving the clock arms to match a time presented on a button.
Curated OER
Math: Creating Fraction Strips
Third graders construct fraction strips to play several math games. Using different colored construction paper, they assemble the strips and play Order the Fractions and Fraction War. With a pair of dice, 3rd graders roll fractions...