Find a course, enroll for free, and move through short activities at your own pace — with a live coach a click away.
Cortex courses are self-paced and grounded in real expertise. Every course is a short sequence of bite-sized activities — readings, videos, quizzes, flashcards and more.
You browse the catalog, open a course, and enroll for free. From there you move through the activities one at a time in the player, your progress saves automatically, and you can ask the live voice coach a question at any point. Nothing here is timed and nothing is lost — you can always come back and pick up where you left off.
Preview activities without signing in. You only sign in when you enroll — so your progress can be saved to your account.Everything starts at the catalog, which lists the published, self-paced courses.

/cortex — the Cortex — Self-paced courses catalog. It shows only published courses. Click any course card to open it./cortex/[courseSlug] shows the title, subtitle, description, and the full curriculum. Each activity carries a small type badge, and any free activity carries a Preview badge. Use the top-left All courses link to go back.Enroll — free. If you are signed out, an auth modal (“Sign in to enroll…”) opens over the page. On success it enrolls you automatically and drops you straight into the first activity — no need to click again.Continue (with an N% complete label and a slim progress bar) if you have made progress, or Start course if you have not begun yet.
Preview to open it directly in the player. You will see a small banner reminding you that you are previewing, with anEnroll — free button whenever you are ready to commit and save your progress.Once you enroll (or open a preview), you land in the player — where you actually do the course.

The player lives at /cortex/[courseSlug]/[activitySlug]. The left sidebar holds a back link, a progress bar with an N% complete label, and the list of sections and activities. Completed activities show a tick, each activity shows its type icon, and the one you are on is highlighted. If you are previewing without enrolling, a“You’re previewing this course.” banner sits at the top with anEnroll — free button.
There are three easy ways to move around:
Previous button to step back.A Cortex course mixes several kinds of activity. Here is what each one asks of you as a learner.
Mark complete & continue to move on.Download to save the attached file.← Prev / Next → to move through the deck.Submit answers. The server grades it and a debrief appears — see the callout below.Check. When every pair is right you see All matched! and the activity completes itself.Check order. When the order is right you see Correct order! and the activity completes itself.Try again. When you pass, the quiz completes itself and you can move to the next activity.You never have to save by hand — Cortex tracks it for you.
Every completion is saved automatically, and the sidebar percentage updates as you go. The interactive types that check your work — quiz, matching andsequencing — complete themselves the moment you get them right. The other types (like reading) use the Mark complete & continue button.
On the very last activity that button reads Finish instead. When you reach 100%, the course is marked completed for your account. You can revisit any activity at any time — being finished does not lock anything.
Stuck, curious, or want something explained a different way? Every player page has a live coach you can just talk to.
Ask the coach button in the bottom-right corner of any activity page. The Voice Coach panel slides open.Start talking to begin a live, spoken conversation. You will see“Connecting…” and then “Connected — just talk” — from there, just speak naturally. Indicators show “Coach is speaking…” and “Listening…” so you always know whose turn it is.End conversation to stop talking, or the X to close the panel entirely.