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"I Know It" is an online game for practicing primary-level math concepts.

LeetCode
The bug you can't spot today ships tomorrow. Train before the incident: one realistic AI pull request a day, graded against a canonical review. Free, no signup.

Which is more popular?
Based on our record, I Know It seems to be more popular. It has been mentioned 1 time since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | iknowit.com | diffdojo.com |
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What each product offers, as listed by its team.


Possible disadvantages
Walkthroughs and reviews on video.
I Know It Review
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How often each product is chosen within a category, 0–100% relative to the other.


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Recommendations tracked on public social media and blogs since March 2021.


For supplemental math, try “I Know It” iKnowIt.com. There are cute cartoon animations for kids, and hundreds of review math lessons/skills/topics. Source: about 4 years ago
Tracking DiffDojo since Sep 2026.
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The site aims to cover the full Kindergarten to Year 12 curriculum.
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Tux, of Math Command, AKA TuxMath, lets kids hone their arithmetic skills while they defend...
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Calm, repeatable math games that help learners build confidence in multiplication, fractions, and foundational math skills.
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A free, browser-based tug-of-war math game designed for interactive whiteboards and classroom displays. Two teams compete head-to-head solving math problems.
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