This short video and interactive assessment activity is designed to teach fourth graders about subtracting capacities in compound units (english units).

This short video and interactive assessment activity is designed to teach fifth graders about adding fractions with common denominators.

This short video and interactive assessment activity is designed to teach fifth graders about subtracting fractions with different denominators.

This short video and interactive assessment activity is designed to teach fifth graders about subtracting mixed numbers with common denominators.

This short video and interactive assessment activity is designed to teach second graders about subtracting one-digit numbers - word problems.

This short video and interactive assessment activity is designed to teach second graders an overview of subtraction (numbers up to 20).

This short video and interactive assessment activity is designed to teach third graders about subtraction: completing the subtraction sentence.

This short video and interactive assessment activity is designed to teach fourth graders about subtraction: completing the subtraction sentence.

This is a video and interactive assessment activity designed to help first graders learn about subtraction word problems up to twenty.

This short video and interactive assessment activity is designed to teach fifth graders about subtraction in grams.

This short video and interactive assessment activity is designed to teach fifth graders about subtraction in kilograms.

This video and accompanying interactive assessment practice was designed to teach Two-step Subtraction (Numbers to 100) - Word Problems to first graders.

This short video and interactive assessment activity is designed to teach second graders an overview of subtraction (numbers up to 10).

This short video and interactive assessment activity is designed to teach second graders about subtracting by counting backward with pictures.

This course features a video review and an assessment practice of subtracting by crossing out with pictures for word problems. It is aimed at first grade math students.

There are several textbooks for students whose majors include internships in human services, broadly defi­­­ned, such case management, counseling, criminal justice, and social work. Most of these books are written in an academic format. Typically, it involves an introduction to a theoretical orientation that concerns working with others followed by a series of chapters devoted to learning professional skills associated with a given discipline. This approach is fine, as far as it goes, but also has two drawbacks. One is that the texts are usually sold by main stream publishers, which means they are expensive. Another is that they seldom address what might be described as the experiential dimension of the internship that most beginners face on their own. This new book addresses both concerns. The fact that it is offered as a free text addresses the first issue, of course, but the second one requires a new approach. It began with asking students to talk about what they experienced when going through their first internship and what they would tell others about how to make it a successful one. That work led to a structured narrative about basic practical topics, such as finding an internship, getting started there, making effective use of supervision, understanding ethics, appreciating cultural diversity, becoming competent, and completing the internship. The text includes descriptions, suggestions, and exercises. It may be used as either a primary course text or, due to its relative brevity, a supplemental one. Although the lead editor is an experienced clinician and professor who has supervised internships for a variety of human services majors over many years, the book was written with and for students to make it more readable and more useful.

Students culture cells in order to find out which type of surfactant (in this case, soap) is best at removing bacteria. Groups culture cells from unwashed hands and add regular bar soap, regular liquid soap, anti-bacterial soap, dishwasher soap, and hand sanitizer to the cultures. The cultures are allowed to grow for two days and then the students assess which type of soap design did the best job of removing bacteria cells from unwashed hands. Students extend their knowledge of engineering and surfactants for different environmental applications.

In this activity, students act as environmental engineers involved with the clean up of a toxic spill. Using bioremediation as the process, students select which bacteria they will use to eat up the pollutant spilled. Students learn how engineers use bioremediation to make organism degrade harmful chemicals. Engineers must make sure bacteria have everything they need to live and degrade contaminants for bioremediation to happen. Students learn about the needs of living things by setting up an experiment with yeast. The scientific method is reinforced as students must design the experiment themselves making sure they include a control and complete parts of a formal lab report.

What happens when sugar and salt are added to water? Pour in sugar, shake in salt, and evaporate water to see the effects on concentration and conductivity. Zoom in to see how different sugar and salt compounds dissolve. Zoom in again to explore the role of water.