A textbook has text. You can supply your own or incorporate open-source material such as offered by organizations such as https://openstax.org. [br][br][img]https://openstax.org/images/logo.svg[/img][br][br][br][br][br]Or peruse the offerings provided by users of Geogebra.[br][br][img]https://www.geogebra.org/images/landingpage/landingpage-icons-tryout.png[/img]

It is very easy to add interactives made with the Geogebra platform. You can make your own or use and modify the many offerings from the world-wide Geogebra community.

One great source for interactives is Direct Measurement Videos (http://serc.carleton.edu/dmvideos/index.html). As you can see below, the team at DMV do a nice job overlaying scales and supplying tools to make easy motion measurements.

The calculation tool I have my students use is Desmos. Reasons why can be seen at student.desmos.com (type in [url=https://teacher.desmos.com/activitybuilder/teacher/58862460a107a4a80550fd8c]52u56[/url] for the class code). Below is that tool. You have students enter the data they collected from the above Direct Measurement Video and do the analysis easily. Try it out to see how easy it is.

Following are some questions that students can answer and get automatic feedback. Note that you can add multiple-choice questions and typed-response.[br][br][br]Does the data show a linear tendency? Try both a linear regression on the data above and a quadratic regression. Which one looks to be the better fit?

Another great source of interactives is from the Phet site (https://phet.colorado.edu/). [br][br][img width=156,height=74]https://phet.colorado.edu/images/phet-logo-tm.svg[/img][br][br]Below is one added to this worksheet.

While a worksheet using these resources can be a valuable addition to your teaching, they are not perfect. The biggest problem is that students need be connected to the internet to use the interactives. [br][br]And you can see that the overall format is very plain. While you can add [i][b][color=#ff0000]font effects[color=#000000], [/color][/color][/b][/i][color=#ff0000][color=#000000]and [math]y=-0.5t^2+25t+150[/math], you won't be able to make the text as nice as you might like.[/color][/color][br][br]However, as a way to get your students to use many of the great physics resources available to them, these Geogebra books are nice.

Adjust the initial position (x), initial velocity (v_0), and acceleration (a) of the car using the sliders. Press the "Run" button to observe the motion of the car.