CK-12 Foundation
Ck 12: Elem Math: Adding Fractions With Different Denominators
[Free Registration/Login may be required to access all resource tools.] This begins with a video that gives a list of steps and describes how to add fractions with unlike denominators. Following the video is practice problems adding two...
CK-12 Foundation
Ck 12: Elem Math: Selecting the Correct Subtraction Sentence
[Free Registration/Login may be required to access all resource tools.] This video describes how to find the subtraction problem that does fit for the solution given in the question. The video is followed by a series of practice...
CK-12 Foundation
Ck 12: Elem Math: Selecting the Incorrect Subtraction Sentence Ii
[Free Registration/Login may be required to access all resource tools.] The video shows how to finding the missing number in a two-digit subtraction problem by working backwards. The video is followed by a series of practice questions to...
CK-12 Foundation
Ck 12: Elem Math: Addition Select the Correct Sentence
[Free Registration/Login may be required to access all resource tools.] The video shows how to solve addition problems to determine which math sentence matches the given sum. The video is followed by practice problems covering the topics...
CK-12 Foundation
Ck 12: Elem Math: Completing the Addition Sentence Sums to 20
[Free Registration/Login may be required to access all resource tools.] The video shows how to count backwards to determine the missing number in an addition problem. The video is followed by practice problems to assess student...
CK-12 Foundation
Ck 12: Elem Math: Understanding Less Than and More Than
[Free Registration/Login may be required to access all resource tools.] The video describes what less than means mathematically by continually counting one less than the number provided in the example. The video is followed by a series...
CK-12 Foundation
Ck 12: Elem Math: Selecting the Related Subtraction Facts
[Free Registration/Login may be required to access all resource tools.] The video describes the parts of a subtraction problem to aide in determining which additional subtraction problem is related to the original problem. The video is...
CK-12 Foundation
Ck 12: Elem Math: One Step Subtraction Numbers to 100 Word Problems
[Free Registration/Login may be required to access all resource tools.] The video is a subtraction word problem that describes how to subtract using regrouping. The video is followed by a series of practice questions to assess student...
CK-12 Foundation
Ck 12: Elem Math: Subtracting 2 Digit Numbers Without Regrouping
[Free Registration/Login may be required to access all resource tools.] The video shows a subtraction problem with two digit numbers. The video is followed by a series of practice questions to assess student comprehension of the concept.
CK-12 Foundation
Ck 12: Elem Math: Overview of Telling Time to Quarter and Hour
[Free Registration/Login may be required to access all resource tools.] The video describes the different parts of a clock, how to tell hours, how to tell minutes, and how to write the time displayed on the clock digitally.
CK-12 Foundation
Ck 12: Elem Math: Counting Rectangle,s Squares, Circles, and Triangles in Sets
[Free Registration/Login may be required to access all resource tools.] The video displays a set of figures and reviews triangles by number of sides. Then all of the triangles out of the set of figures are chosen. The video is followed...
CK-12 Foundation
Ck 12: Elem Math: Adding Word Problems Sums to 20
[Free Registration/Login may be required to access all resource tools.] The video shows how to solve an addition word problem with a sum up to 20. The video is followed by additional practice problems.
CK-12 Foundation
Ck 12: Elem Math: Selecting the Incorrect Addition Sentence
[Free Registration/Login may be required to access all resource tools.] This video describes how to find the addition problem that does not fit for the solution given in the question. The video is followed by a series of practice...
CK-12 Foundation
Ck 12: Elem Math: Subtracting Word Problems Numbers Up to 20
[Free Registration/Login may be required to access all resource tools.] The video shows a subtraction word problem with numbers less than 20 and describes how to solve the problem. The video is followed by a series of practice questions...
CK-12 Foundation
Ck 12: Elem Math: Mixed Operations Addition and Subtraction I Word Problems
[Free Registration/Login may be required to access all resource tools.] The video shows how to solve a word problem with addition and subtraction of two-digit numbers. The video is followed by a series of practice questions to assess...
CK-12 Foundation
Ck 12: Elem Math: Guessing the Correct Numbers
[Free Registration/Login may be required to access all resource tools.] The video describes how to break down a statement to determine the value of a number given two different constraints. The video is followed by a series of practice...
CK-12 Foundation
Ck 12: Elem Math: Comparing With Two Step Addition and Subtraction
[Free Registration/Login may be required to access all resource tools.] The video is a 2 part word problem using addition and subtraction. The video is followed by practice problems to assess student understanding of the concept.
CK-12 Foundation
Ck 12: Elem Math: Adding Two Digit Numbers With Regrouping
[Free Registration/Login may be required to access all resource tools.] The video models how to add two-digit numbers using regrouping. The video is followed by practice problems.
CK-12 Foundation
Ck 12: Elem Math: Addition 3 Digits
[Free Registration/Login may be required to access all resource tools.] The video describes how to solve a 3-digit addition problem. The video is followed by practice problems covering the topic in the video.
CK-12 Foundation
Ck 12: Elem Math: Addition Select the Incorrect Sentence
[Free Registration/Login may be required to access all resource tools.] The video shows how to solve addition problems to determine which math sentence does not match the given sum. The video is followed by practice problems covering the...
CK-12 Foundation
Ck 12: Elem Math: Addition Complete the Addition Sentence
[Free Registration/Login may be required to access all resource tools.] The video shows how to work backwards to solve a 3-digit addition problem. The video is followed by practice problems covering the topics in the video.
CK-12 Foundation
Ck 12: Elem Math: Subtraction 3 Digits Minus 3 Digits
[Free Registration/Login may be required to access all resource tools.] The video shows how to subtract 3-digit numbers without regrouping. The video is followed by additional problems for students to practice the skills discussed in the...
CK-12 Foundation
Ck 12: Elem Math: Subtraction Select the Incorrect Sentence
[Free Registration/Login may be required to access all resource tools.] The video shows how to use regrouping to solve a series of multi-digit subtraction problems to determine which one does not result in the given difference. The video...
CK-12 Foundation
Ck 12: Elem Math: Subtraction Complete the Subtraction Sentence
[Free Registration/Login may be required to access all resource tools.] The video describes how to work backwards working with 3-digit numbers to determine what number is missing in the subtraction sentence. The video is followed by...