If you’ve ever needed an excessive amount of photographs or diagrams to accurately describe a physical object for your class, you may benefit from a 3D model.

Standard media types, including text, photographs, illustrations, audio, video, and animation, are crucial to the online learning experience. A 3D model is essentially another media type with a lot of unique qualities.

What is a 3D model?

3D models, in this case, are digital representations of physical objects. 3D models generally consist of a polygon mesh and a surface texture. The polygon mesh is a “shell” comprised of the different surfaces of a 3-dimensional object. There are three main components that make up this shell: vertices (points), edges (lines), and faces (planes). For what should be clear from the previous sentence, polygon meshes are often referred to as simply “geometry.” There are a lot of other technical terms associated with polygon meshes, but in practical application, you may never need to learn them.

The surface texture, at its most basic, is an image, mapped onto the surface of the polygon mesh.

A texture can be as simple as a solid color, or as complex as a high-resolution photograph. The texture will be wrapped onto the surface of the geometry with the help of a set of instructions called UVs. UVs are a complex topic in and of themselves, so it’s good enough that you just know they exist conceptually.

These textures can have physics-based properties that interact with light to produce effects such as transparency, reflection, shadows, etc.

You’re probably thinking to yourself now, that 3D models are too complicated to be of use in your courses, but that’s not necessarily true. The composition and inner workings of 3D models are complicated, for sure, but you don’t need to be an expert to benefit from them.

Where did they come from, and how are they used?

There probably isn’t a day that goes by where you don’t experience a 3D model in some way. They are everywhere.

3D models, in digital form, have been around for decades. They have been used in industrial applications extensively. 3D models are used to generate toolpaths for small and large machines to manufacture parts more consistently than a human could ever hope to. 3D models are also used to generate toolpaths for 3D printers.

3D models are used in movies, animations, and video games. Sometimes entire worlds are created with 3D models for use in virtual and augmented reality.

Modern interfaces for computers and smartphones are awash in 3D graphics. Those graphics are rendered on the screen from 3D models!

How can they help me as an educator?

If you’re still not convinced that 3D models hold any benefit to you, I’ll explain a few ways in which they can enrich your course materials.

  1. 3D models are easily examined and manipulated without damage to physical specimen.
    • If you are involved in teaching a course with physical specimens, you are no doubt familiar with the concept of a “teaching collection.” A teaching collection is a high-turnover collection that gets handled and examined during class. Normally these collections break down quickly, so instructors are hesitant to include rare and fragile specimens. Having digital proxies for these rare and fragile specimens will allow students access to otherwise unknown information. This has even bigger benefits to distance students, as they don’t have to be anywhere near the collection to examine its contents.
  2. 3D models give students unlimited time with a specimen
    • If you have a biology lab, and the students are looking at skull morphology, there’s a distinct possibility that you would have a skull on hand to examine. If there are 30 students in the course, each student will have only a short amount of time to examine the specimen. If that same skull was scanned and made into a 3D model, each student could examine it simultaneously, for as long as they need.
  3. 3D models are easily shared
    • Many schools and universities around the world are digitizing their collections and sharing them. There is a fair amount of overlap in the models being created, but the ability to add regionally exclusive content to a global repository would be an amazing benefit to science at large. Smaller schools can have access to a greater pool of materials, and that is good for everyone.
  4. 3D models have presence
    • A 3D model is a media object. That means it can be examined, but it’s special in the way that it can be interacted with. Functionality can be built on and around a 3D model. Models can be manipulated, animated, and scaled. A photograph captures the light bouncing off of an object, that is closer to a description of the object.  A 3D model is a representation of the actual physical properties of the object, and that strikes at the nature of the object itself. This means that a 3D model can “stand in” for a real object in simulations, and the laws of physics can be applied accurately. This realistic depth and spatial presence can be very impactful to students. Much more so than a simple photograph.
  5. 3D models can be analyzed
    • Because 3D models are accurate, and because they occupy no physical space, they lend themselves to analysis techniques unavailable to the physical world. Two models can be literally laid on top of one another to highlight any differences. Measurements of structures can be taken with a few clicks. In the case of a machined part, material stress tests can be run over and over without the need to replace the part.

These are only a few of the ways that an educator could leverage 3D models. There are many more. So, if you still find 3D models interesting, you’re probably wondering how to get them, or where to look. There are a lot of places to find them, and a lot of techniques to build them yourself. I’ll outline a few.

Where do I get them?

3D models are available all over the internet, but there are a few reputable sources that you should definitely try first. Some will allow you to download models, and some will allow you to link to models on their site. Some will allow you to use the models for free, while others will require a fee. Some will have options for all of the aforementioned things.

How do I create them?

The two main ways to create 3D models are scanning and modeling.

Scanning can be prohibitively expensive, as the hardware can run from a few hundred dollars, to many thousands of dollars. But, like anything else technological, you get what you pay for. The quality is substantially better with higher-end scanners.

For something a little more consumer-grade, a technique called photogrammetry can be employed. This is a software solution that only requires you to take a large series of photographs. There is some nuance to the technique, but it can work well for those unable to spend thousands of dollars on a 3D scanner. Some examples of photogrammetry software include PhotoScan and COLMAP.

Modeling has a steep learning curve. There are many different software packages that allow you to create 3D models, and depending on your application, some will be better suited than others. If you are looking to create industrial schematics or architectural models, something likeFusion 360, AutoCad, or Solidworks might be a good choice. If you’re trying to sculpt an artistic vision, where the precise dimensions are less important, Maya, Blender, Mudbox or Zbrush may be your choice.

How to use them in your class:

There are a number of ways to use 3D models in your class. The simplest way is to link to the object on the website in which it resides. At OSU Ecampus, we use the site, SketchFab, to house our 3D scans. The source files stay with us as we create them, but we can easily upload them to SketchFab, brand them, and direct students to view them. SketchFab also allows us to add data to the model by way of written descriptions andannotations anchored to specific structures in the model.

The models hosted on SketchFab behave similarly to YouTube videos. You can embed them in your own site, and they are cross-platform compatible. They are even mobile-friendly.

As you can see, there is a lot to learn about 3D models and their application. Hopefully, I’ve broken it down into some smaller pieces that you can reasonably pursue on your own. At the very least, I hope that you have a better understanding of how powerful 3D models can be.

A big THANK YOU to Nick Harper, Multimedia Developer, Oregon State University Ecampus

Many educators have contemplated the use of games as way to engage learners, or maybe thought about using some elements found in games to engage learners. A big hurdle for integrating games into a course is the amount of work it takes to build them to use in a course, even if you have the skill-set. Of course, you could always take the easier route and try to integrate an existing game into a course. The hurdles there involve cost and finding a game that supports the content specific to your course. There is another approach to bring game concepts into the learning environment that does not necessitate a huge investment of time, combining game design with problem-based learning.

Create activities in your course that have learners design and contextualize the content of a game. You set the rules and mechanics of how the game will work, your students design how the content fits into that game. No one has to actually program or build a game. The idea is to use game mechanics as a tool to get learners to think about instructional material and how concepts inter-relate.

So where do you begin? Start with what you know. What are your favorite games? These don’t have to be a computer or video game. Think about puzzles, board games, or card games that you have enjoyed. Are there elements of how the game works (mechanics) that can be applied to your course content? Do some ‘research’ (this is the fun part). There is something of a board game renaissance going on right now offering a boggling variety of board and card games. These cover a range of concepts, from pandemics to book collecting. The board game Chronology offers a simple mechanic that can lend itself to a variety of topics. The game works as the name implies.

Remember, you don’t have to provide the rules for an entire game. Keep the activity focused on one element of a game that you can apply to content appropriate for your course and that supports the given learning objectives. Keep the rules simple.

One of my favorite games is Sid Meier’s Civilization V. The purpose of the game is to build a ‘historical’ civilization from the ground up. A key element of the game is researching and building technology. In order to be successful at building technology and move your civilization forward, you have to understand how technologies are inter-related and build on each other. You can’t just research gun powder, for example, but have to first research and develop all of the underlying technologies to get there.

Sample of the technology tree from the game Civiliztion V
You can’t research Horseback Riding before you develop Trapping and Animal Husbandry. (Image from STEAM community workshop)

The above image should be familiar to anyone who has used timelines, production trees or flowcharts. You may already be using something like this in your course. Game design can simply be a way to engage learners in developing these tools.

A big strength of using Project-Based Learning in this way is that it doesn’t require a lot of time to set up and the project can easily be managed with tools that already exist in your LMS, using student Groups, or something as simple as shared Google docs. How far you want to push learner creativity in the design is up to you and the needs of your course.

Here at Ecampus, we are lucky to have a marvelously creative Media Development Team who would be able to help build supporting material for your ideas. Depending on the complexity of the game you propose, it may even be possible to put your learners’ work into a game ‘shell’ that would result in a working version of the game. This, in turn, could be used as a study tool.

Screen Shot 2013-08-21 at 11.06.22 AMDigital timelines are a great way to display a series of events in your online course. They can be used to capture historical events or a series of steps that occur in specific order, for example, a lab activity.

TimelineJS is an easy to use online tool that allows you to create a timeline by pulling in various types of online media such as video, images, and maps from easy to integrate sites such as Twitter, Flickr, Google Maps, YouTube, Vimeo, Vine, Dailymotion, Wikipedia, and SoundCloud. The magic happens in a Google spreadsheet and it is as simple as inserting dates, links, and text into the appropriate columns.

If you are interested in having Ecampus create a timeline for you using this tool, all you need to do is contact your instructional designer. Click the image above to view a timeline that was created for French 329, a course on francophone cultures and film.

Part 1 and 2 are both only 1 slide long, however they exemplify the change in the design. These were created after I found the Oregon State style guides, so they were created with official colors and a more streamlined layout. These allow students to practice identifying kids that might need alternative learning options. These don’t feature any groundbreaking changes, however they do show how I’ve become more layer oriented with a cleaner display.

Experience Part 1 or Part 2 of the storyline yourself.

This storyline project was created for CS 325 on General Recurrence. Katie Hughes the developer has this to say bout her experience:

While this is a seemingly simple project, I really consider it the turning point in my Storyline experience. On one slide, the instructor wanted the student to input a text response, and if that response contained a certain word it would be considered correct. Storyline has nothing supported that does any sort of text comparisons, so this is the project I learned how to integrate JavaScript. Learning JavaScript and how it works in Storyline really opened up a lot of options for other projects after this one. Also, this series of CS 325 lectures is really the first one where I began using a consistent layout for each Storyline project.

Click here, If you would like to experience the storyline yourself.

Here is a simple tool we created from scratch, which points out the mean, median, and mode values from a randomly generated set of data:

Screenshot of Soc315 simple statistics refresher tool

Background:
The instructor noted that students are required to have taken a basic statistics course before starting his Sociology class, but they have often forgotten how to apply the concepts of mean, median and mode to a data set. He asked if we could create a tool that would show these values applied to a data set that the students might actually encounter during their sociology studies. Continue reading

Project Name: Whale Migration
Media: Flash Vector Drawings
Class: FW302
Design Team: Warren Blyth, Thomas Emery

This interactive flash application lets you follow the migration of gray whales off the west coast of North America for 2 years. It follows a pregnant mother, calf, and a male. Numbers came from OSU researchers.

This project was directed by Warren Blyth, programming by Thomas Emery, I was in charge of animation, art, and layout.

Click the image to launch the application. Hit the play button in the bottom left corner to start it.