Curated OER
Rules of Sign Change
Students manipulate negative and positive numbers. In this integers lesson, students move through three activities exploring negative and positive whole numbers. A number line, cardboard function representation, and solving expressions...
Curated OER
Visual Representation of Reduced Fat
Students demonstrate their understanding of the Five-Number Summary and Box-Plots by analyzing different nutrition labels from regular and reduced fat items using graphing calculators.
Curated OER
Stats on Reduced-Fat
Middle schoolers demonstrate an understanding of the Five-Number Summary and Box-Plots after analyzing data from nutrition labels, forming a hypothesis and supporting it. They decide if there is a significant difference between reduced...
Curated OER
Math in My World
Third graders record in their journals the many ways in which mathematics is part of their world.
Curated OER
How Big is a Crowd?
Sixth graders compare the relative sizes of the five Great Lakes and their human populations. They describe some of the problems that arise when many people depend on a limited resoure. Students discuss how the Great Lakes and the...
Curated OER
Ceramic Tile Wall Murals
Students create multi-color lithographic posters, reinterpreting the technique of a famous artist or artistic style. They discuss art history, aesthetics, criticism, and personal expression. Students focus on the elements of design and...
Curated OER
STS Biology - Teaching Controversial Topics
Each of the three activities submitted presents difficult science topics in the context of the human experience. The activities focus on real-world problems, which have science components, from the students' perspectives.
CK-12 Foundation
Ck 12: Elem Math: Overview of Addition Sums to 100 Word Problems
[Free Registration/Login may be required to access all resource tools.] The video explains two addition problems one with regrouping and the other without regrouping.
CK-12 Foundation
Ck 12: Math Grade 1
Browse resources related to first-grade math standards. Click on a topic for interactive lessons, videos, and extra practice.
CK-12 Foundation
Ck 12: Elem Math: Selecting the Correct Addition Sentence Sums to 100
[Free Registration/Login may be required to access all resource tools.] The video walks through solving addition problems to determine which problem is the correct addition sentence for the given sum. The video is followed by additional...
CK-12 Foundation
Ck 12: Elem Math: Overview of Addition Sums to 100 Word Problems
[Free Registration/Login may be required to access all resource tools.] The video explains two addition problems one with regrouping and the other without regrouping.
CK-12 Foundation
Ck 12: Elem Math: Fact Families Numbers to 100
[Free Registration/Login may be required to access all resource tools.] The video shows how to determine the missing number sentence by using fact families.
CK-12 Foundation
Ck 12: Elem Math: One Step Addition Sums to 100 Word Problems
[Free Registration/Login may be required to access all resource tools.] The video describes how to solve a two-digit addition word problem. The video is followed by a series of practice questions to assess student comprehension of the...
CK-12 Foundation
Ck 12: Elem Math: Completing the Addition Sentence Sums to 100
[Free Registration/Login may be required to access all resource tools.] The video describes how to fill in a missing number in an addition problem by working backwards. The video is followed by practice problems to assess student...
CK-12 Foundation
Ck 12: Elem Math: Selecting the Incorrect Addition Sentence Sums to 100
[Free Registration/Login may be required to access all resource tools.] The video describes how to determine which addition problem does not have a sum of the given value. The video is followed by additional problems for students to...
CK-12 Foundation
Ck 12: Elem Math: Filling in the Missing or Sign Numbers to 100
[Free Registration/Login may be required to access all resource tools.] The video works through 2-digit addition and subtraction problems to determine which number sentence coincides with the given value. The video is followed by...
Khan Academy
Khan Academy: Add and Subtract Within 100 Word Problems 1
Practice adding and subtracting to solve word problems. These questions are result unknown or change unknown problems. Numbers used are 100 or less. Students receive immediate feedback and have the opportunity to try questions...
Khan Academy
Khan Academy: Add and Subtract Within 100 Word Problems 3
Practice solving word problems with addition and subtraction. These questions are start unknown problems including add to and take from problems. Numbers used are 100 or less. Students receive immediate feedback and have the opportunity...
Khan Academy
Khan Academy: Challenging Add and Subtract Word Problems (Within 100)
Practice solving more challenging addition and subtraction word problems with "more" and "fewer". Multi-step problems are also included. Numbers used are 100 or less. Students receive immediate feedback and have the opportunity to try...
Khan Academy
Khan Academy: Add and Subtract Within 100 Word Problems 2
Practice solving word problems with addition and subtraction. These questions are comparison problems including difference unknown, smaller value unknown, and bigger value unknown. Numbers used are 100 or less. Students receive immediate...
Khan Academy
Khan Academy: Find the Missing Number (Add and Subtract Within 100)
Practice solving problems like "___ - 45 = 27" where you have to figure out the missing value in an addition or subtraction equation. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video...
Other
Nearpod: Adding Within 100
In this instructional activity on addition within 100, students will learn how to compose numbers and will explore strategies to add double-digit numbers such as vertical addition, regrouping, using multiples of 10, and labeling an open...
Better Lesson
Better Lesson: Crossing Over 100
Second graders often become confused as they count from one decade to the next. In order to become fluent with operations in addition and subtraction, 2nd graders need to be able to move across decades. This lesson includes a detailed...
Khan Academy
Khan Academy: Select Strategies for Adding Within 100
Practice telling which strategies work for adding two numbers within 100. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.