Foldables in Computer Science: Consolidating Our Learning

How might we help learners synthesize important computer science topics (including vocabulary, structures, and techniques) using Foldables? How might these three-dimensional graphic organizers help learners consolidate their learning, while also providing effective notes for later reference?

In designing learning experiences for new-to-CS educators, Toni and I considered how Foldables might dovetail nicely with the 10 Minutes of Code activities provided by Texas Instruments. The 10 Minutes of Code activities do a phenomenal job of crafting short learning episodes that provide students with bite-sized instructional episodes (see the Skill Builders) followed by opportunities to apply their new learning (see the Applications).

Toni and I wanted to build on these 10 Minutes of Code activities by layering additional content connections that deliberately drew out and discussed some of the computer science topics that are operating within the 10 Minutes of Code activities. Specifically, we were working to develop Foldables that formalized CS topics that were important for a beginning teacher of CS to know (as defined by the TExES Computer Science 8-12 certification requirements in Texas).

Our Foldable work is inspired by the top-notch work of Dinah Zike and her crew from Comfort, Texas. If you are new to the world of Foldables, be sure to check out Dinah’s site. Dinah has a ton of resources that support Foldable use and creation in all grade levels and subject areas. Here are some of my favourites: Notebook Foldables, Big Book of Math for MS and HS, and her Notebooking Central resources for Math.

Toni and I wondered: What would Foldables look like in computer science? This led us on a fun journey…! Here are some of the highlights.

Here is a Three-Tab Foldable that overviews introductory Program Protocols, including how to Create (using the Program Editor), Compile (using the Check Syntax & Store command), and Run (using a Calculator page) a program on the TI-Nspire handheld. These ideas connect to the work done in the Unit 1: Program Basics—Skill Builder 1: Introducing the Program Editor 10 Minutes of Code activity.



Here’s another example of a Foldable that uses a screenshot of a program and its output for a given set of actual parameters. This Shutterfold Foldable (with an inlaid screenshot) was used to annotate some details about Formal and Actual Parameters after we wrote our first program that used parameters (in the Unit 1: Program Basics—Skill Builder 2: Arguments & Expressions 10 Minutes of Code activity).



Here’s one of my favourites: a Matchbook Foldable that outlines how a For Loop operates. We used this Foldable to identify the four parts of a For loop, as well to practice tracing out a loop using a table. Notice the inclusion and annotation of a screenshot of the program. This Foldable formalized ideas from the Unit 4: Loops—Skill Builder 1: For Loops 10 Minutes of Code activity.


Here’s an awesome tweet from a learner in one of Toni’s workshops and his work with this exact Foldable! Love it!

We created similar Matchbook Foldables for While Loops and Do While Loops, but then also created this Three-Tab Foldable to compare and contrast the three types of loops (For, While, and Do While). This Foldable helped learners step back and consider the important similarities and differences across the three loop types that were studied throughout the Unit 4: Loops 10 Minutes of Code activities.

Here’s an example of using a Shutterfold Foldable to document and analyze two Computer Science techniques (specifically, using Counters and Accumulators). This builds on the ideas used in the Unit 4: Loops—Application: Bank Notices 10 Minutes of Code activity. Consider how a Foldable like this serves as a way to consolidate new information, but also as a helpful resource for later reference and use.


We have received really positive feedback about how these Foldables helped learners step back from the coding experiences and synthesize the ideas they were learning about and experimenting with in a meaningful way. The Foldables helped to organize and chunk the main ideas and were also really handy for revisiting ideas throughout the learning episodes.

The examples above are a sampling of the Foldables that Toni and I have created for formalizing CS topics. We love doing this work!

What other topics from computer science might be a good fit for Foldables? What other strategies might be effective for creating powerful Foldables for CS topics? How might Foldables dovetail into work with the TI-Innovator Hub and those 10 Minutes of Code activities?

Guest Post by Toni Norrell | Back-Up Sensor using the Ultrasonic Ranger

Another fantastic post from Toni Norrell (@ToniNorrell).

A friend of mine I’ll call Sandy drives a very fancy car! Her car has all the bells and whistles you might say. It has cameras/sensors all the way around that beep a lot. She has a tendency to ignore them when pulling in and out of parking spots because they beep when she is too close to the curb, they beep at the cars parked on either side, they beep if a car drives behind the car, etc. This particular day she ignored the beeps and backed right into a parked car! Like any good friend would, I made her a pillow that says “Respect the Beep.”

Michelle & I started thinking about how this incident could be modeled using the Ultrasonic Ranger & Innovator Hub. We wanted to write a program that was similar to a back-up sensor on a car. This expands upon my previous post about first collecting distance data from the ultrasonic ranger.


The program connects the ranger and uses the warm-up program that Michelle talked about in a previous post. The distance variable is initialized and a while loop is setup to read, get, and display the distance as long as it is more than .01 meters.

The If Then looks at distances between 0.1 and 0.5 and sets the hub to send a sound with a particular frequency if the ranger is within that distance.

When the “car” gets closer than 0.1, a higher frequency sound is heard.

We set both of these sounds inside For loops to provide more of the “pulse-like beeping” you often hear from a car’s back-up sensor.

Here is a copy of the complete TNS file for you to try! Also, here’s a short video clip of this program in action:

What other ways could this program have been written?
How could it run even more like a back-up sensor on a car?

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Guest Post by Toni Norrell | Getting Started with the Ultrasonic Ranger (with the Innovator Hub)

A great post from Math & Computer Science guru Toni Norrell (@ToniNorrell).

Michelle & I wanted to explore using the Ultrasonic Ranger with the Innovator Hub for a presentation we were putting together. We started off by focusing on the syntax needed to connect the ranger to collect a distance measurement. This consisted of several lines of code in the screenshot shown below.

Send “CONNECT RANGER 1 TO IN 1” is the initial code that connects the ranger (named RANGER 1) to the hub digitally. Physically, the ranger is connected in the port IN 1 on the side of the Innovator hub. The commands Send “CONNECT RANGER are found under the hub menu (Send “CONNECT -Input), TO is found in the hub menu under settings, and IN 1 is found under the hub menu and Ports.

Once the ranger is connected, we want to send a command to read this device called RANGER 1 using the command Send “READ RANGER 1” . The “READ” command tells the Ranger to “read” the distance at that particular instance in time. So far, we have connected the ranger, and read the ranger, but we haven’t done anything with that reading. Our next statement Get distance, will actually get the reading and then store it in a variable named distance. Of course, we won’t see this value unless we use the display command to show us the output: Disp distance. Note: The display command is not necessary for the data collection to work, however, it is a nice feature that allows us to get that visual check to see if our program is recording and saving distances.

It is good practice to use the last line of code which is Send “DISCONNECT RANGER 1” which is found under the hub menu. On the next post, Michelle will address the warm_up() statement in the code.

Here’s a short video showing this program in action. Also, you can download a copy of the TNS file for this short program.

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