After a bit of a false start earlier when Portal was listed as a free game on Steam and then priced again, some clarity has emerged with the revelation from one of our members about the Learn with Portals site, which has recently gone live. From the site:

One of the biggest challenges in teaching science, technology, engineering, and math is capturing the students’ imaginations long enough for them to see all of the possibilities that lie ahead.

Using interactive tools like the Portal series to draw them in makes physics, math, logic, spatial reasoning, probability, and problem-solving interesting, cool, and fun which gets us one step closer to our goal—engaged, thoughtful kids!

Portal is once again listed as a free game on the official site and this time we were successfully able to add it to an account to ensure that it's definitely working properly now.

We expect a full press release from Valve within the next few hours about this promotion, but it looks like it's all live now and ready to go - so dig in!

There's a video on the site, available below, which shows the results of a seventh grade field trip to Valve - showing the kids using Portal as an educational tool. Best field trip ever.