Understanding comes first.

What is available today?

254 authored lessons and 2,273 questions cover kindergarten through selected Grade 4 topics. Six starter activities reach further grades. The complete K–12 Common Core inventory is a navigation map; it does not mean every standard has a finished course.

A useful learning routine

1. Ask the learner to describe the picture or story in their own words.
2. Try a different quantity. Predict what will change before moving a control.
3. Practice a question and discuss why the answer makes sense.
4. Return to the idea in a different situation. A correct answer once is not mastery.

Word problems and written answers

Guided stories help learners identify meaningful quantities and intermediate steps. Questions include multiple choice, typed numbers and fractions, and structured plans. Supported responses are evaluated by the Python API. Student-submitted questions have a limited arithmetic and sharing solver; other questions can be kept in a notebook. Drawings are not handwriting-graded.

Progress and accounts

Guest progress is saved to the learning service using this browser’s private session. The guest session lasts 90 days. Clearing browser data or changing device can make it inaccessible. Parent and teacher accounts, cross-device recovery and classroom management are being developed.

Built with care, still growing

Mathematical quantities, diagrams and evaluation rules are tested together. Official curriculum references appear on lesson pages. Automated checks do not replace independent teacher review or classroom evaluation.