Learning Object

Stain Measurement & Calculating Angles of Impact (Screencast)
In this learning object the student will learn how to measure a stain and calculate angles of impact. Determining the angle of impact for bloodstains takes advantage of the trigonometric functions (Sine function).A mathematical relationship exists between the width and length of an elliptical bloodstain which allows for the calculation of the angle of the impact for the original spherical drop of blood.Given well formed stains we can accurately measure the width and length by simply dividing the stain along it’s major and minor axis. The opposite halves would be generally equal to each other which aids in establishing the impact angle.
Main Category
Public Service & Safety
Subcategories
Public Safety
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Why Wisc-Online Moved to WisTech Open

In January 2026, Wisc-Online transitioned to WisTech Open to better align with current educational standards and long-term goals. During this process, the catalog was reviewed and content that did not meet accessibility requirements or was outdated was removed. Games were also taken down, and the team is evaluating the possibility of adding them back in the future with accessibility and quality standards in mind.

Wisc-Online FAQs

Explore this section for helpful answers to common questions regarding Wisc-Online.

Why did Wisc-Online change?
Wisc-Online has supported millions of learners for over 20 years. It was time for a refresh! By moving to WisTech Open, we were able to continue offering free, high-quality learning resources on a more modern, sustainable platform.
What happened with the Wisc-Online Arcade?
The Play Games Arcade went offline at the time Wisc-Online moved to WisTech Open.
Do saved links or bookmarks still work?
No, bookmarks to the old site stopped working after December 2025.
What happened to Wisc-Online objects that were downloaded into LMS platforms?

If instructors had downloaded and embedded Wisc-Online objects (like SCORM packages) into their LMS, those continued to work even after the Wisc-Online site transitioned to WisTech Open. These objects were self-contained and did not rely on the live site.

Is there an opportunity to develop new content?

Yes. Ideas for new content could be shared at https://www.wistechopen.org/contact by selecting “Pitch a Project Idea.” All project ideas are considered based on available funding.