[Free Registration/Login may be required to access all resource tools.] Group 18 elements and their properties.

[Free Registration/Login may be required to access all resource tools.] Definition and an example of sublimation, and conditions under which sublimation of snow and ice occur.

[Free Registration/Login may be required to access all resource tools.] Describes the design and function of a calorimeter along with calorimetry sample problems.

[Free Registration/Login may be required to access all resource tools.] Covers three common bacterial STIs.

[Free Registration/Login may be required to access all resource tools.] Overview of human diseases caused by fungi.

[Free Registration/Login may be required to access all resource tools.] Introduces Hardy-Weinberg equilibrium.

[Free Registration/Login may be required to access all resource tools.] How buildings can be made safer from earthquakes.

[Free Registration/Login may be required to access all resource tools.] Describes how humans use water today.

[Free Registration/Login may be required to access all resource tools.] The video uses pictures to understand the relationship between multiplication and division. The video is followed by a series of practice questions to assess student...

[Free Registration/Login may be required to access all resource tools.] The video lesson explains the relationship between repeated addition and multiplication. The video is followed by a series of practice questions to assess student...

[Free Registration/Login may be required to access all resource tools.] The video models how to solve a multiplication word problem using pictures, writing the number sentence and solving.

[Free Registration/Login may be required to access all resource tools.] The video [0:34] describes how to add and subtract measurements of length from a given word problem. The video is followed by practice problems covering the topics...

[Free Registration/Login may be required to access all resource tools.] The PLIX interactive source allows students to use base ten blocks to explore place value and numbers in the hundreds. There is also a video that describes how to...

[Free Registration/Login may be required to access all resource tools.] The video describes how to solve a two-digit subtraction problem without regrouping. The video is followed by additional problems for students to practice the skills...

[Free Registration/Login may be required to access all resource tools.] The video shows how to compare numbers in a word problem using multiple operations to find given values and the solutions to the questions posed in the problem. The...

[Free Registration/Login may be required to access all resource tools.] In this interactive media source, the video defines comparative word problems and describes an example of how to compare using numbers less than 10.

[Free Registration/Login may be required to access all resource tools.] The video shows how to break down a word problem into two steps to solve an addition problem with numbers up to 100. The video is followed by a series of practice...

[Free Registration/Login may be required to access all resource tools.] The video discusses a brief overview of circles, rectangles, squares, and triangles and helps students determine which shape is shown and why. The video is followed...

[Free Registration/Login may be required to access all resource tools.] The video calculates length of different objects and then compares the various lengths. The video is followed by a series of practice questions to assess student...

[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...

[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...

[Free Registration/Login may be required to access all resource tools.] The video describes how to determine which addition fact is related to the given addition problem. The video uses vocabulary of addends and sum. The video is...

[Free Registration/Login may be required to access all resource tools.] The video shows a model of how to group using tens and ones, subtract, and then count what is left using the grouping. The video is followed by a series of practice...

[Free Registration/Login may be required to access all resource tools.] In this interactive media source, the video shows how to write a number sentence from counting groups of pencils, followed by practice problems to assess understanding.