ExplainerTools

Math · Interactive demo

How many riffles mix a deck?

Drag the riffle count and watch a 52-card deck cut and interleave, while the exact model shows how far every possible deck is from uniform.

Created by ExplainerTools.

What you’ll explore

This interactive demo gives you a visual way into math. The key ideas include Probability, Seven Riffles.

Continue learning

See how the world works.

Explore interactive ideas in space, science, math, and more. Try a demo, read an interactive article, watch a short video, and follow what makes you curious.

Find your next rabbit hole

New Originals

Change one thing and see why.

The three newest models, each with a short film. Watch the question, then play with the answer.

All Originals

Follow your curiosity

A collection of small doors into big ideas.

Explore by format

Loading collection…

Opening the collection…

Make something click.

Made an explainer, or found one you love? Give it a place in the collection.

Your next question

What do you wish someone would explain?

Send one question. If it becomes an ExplainerTools Original, you can hear when it is ready.

Only your question and optional email are saved.

Share something worth understanding.

An interactive demo, an interactive article, or an educational video. Every suggestion is reviewed before it joins the collection.

Submit the creator’s original link. We credit creators and link to their work.

A collection for the curious.

ExplainerTools collects interactive explainers, visual essays, and educational videos that help an idea make sense. Browse by subject, follow a topic, or find a creator whose way of explaining speaks to you.

The work belongs to its creators.

Every entry credits its original creator. Supported experiences play here, with a link to the creator’s original work available in the player. Inclusion does not imply a partnership or endorsement.

How rankings work

Views, likes, and bookmarks count activity on ExplainerTools. They don’t include views or likes from a creator’s website or social accounts. Newest means most recently added to this collection. Ties are ordered by date added, then our curated catalog order.

Your collection

New likes and bookmarks require a free account and sync across devices when sign-in is available. Previously saved items from this browser may remain visible here.

Browse the catalog data or read about privacy.