Curated OER
Halves, Thirds, and Sixths
An excellent activity that effectively pulls together the concepts of area, fractions, and equivalent fractions! Using 3x2 rectangular arrays, 3rd graders are introduced to the concept of area in terms of square units. Building on this...
EngageNY
Writing Products as Sums and Sums as Products
Create rectangle and area models to help students understand expressions. The third installment in the 28-part series has pupils first represent expressions using rectangular array models. The exercises help scholars understand the...
College Board
2012 AP® Computer Science A Free-Response Questions
There's really no better way to become acquainted with the AP test format than to look at past exams. A set of four free-response questions assesses knowledge of computer science skills. They cover a variety of topics including how to...
Curated OER
Shapes and Their Insides
Learners follow a series of instructions for drawing and coloring different shapes in order to learn the difference between the perimeter and area of a polygon. Then they are asked to find the perimeter and area of a 3x4 rectangular...
California Education Partners
Lashelles Garden
Let knowledge grow bountifully like plants in a garden. Given a diagram of a rectangular garden split into plots, scholars determine the area of the entire garden and the areas of the individual plots. As a culminating activity, they...
Illustrative Mathematics
Illustrative Mathematics: Counting Dots in Arrays
This activity addresses CCSS 2.OA.C.4 where students count dots in an array using repeated addition. This skill lays the foundation for an understanding of multiplication.
OnlineMathLearning.com
Online Math Learning: Addition and Arrays (Grade 2)
A list of suggested activities for addressing CCSS 2.OA.C.4 where students work with arrays and repeated addition. Includes a problem for a 3X5 array and its solution in a video. [8:23]
Khan Academy
Khan Academy: Repeated Addition
In this exercise, students practice repeated addition. Students receive immediate feedback and have the opportunity to get hints, watch a tutorial video, and try questions repeatedly.
Alabama Learning Exchange
Alex: What's Your Question? Multiplication Word Problems
Learners will explore multiplication and word problems. They will work cooperatively to examine a story scenario, list possible questions to develop a completed word problem and solve it using a variety of strategies. The students will...
Other
2nd Grade Worksheets: Common Core State Standard 2.oa.4
A collection of four worksheet sets that address the Common Core State Standard 2.OA.4.