
JSFiddle
CodeSandbox
GitHub
replit
VS Code
Pastebin.com
JS Bin
A front end web development playground.

Mathter.ca
Tiger Math
Khan Academy Kids
Ixl
Workybooks
Photomath
Khan Academy
Adaptive K-8 math practice. Meets students at their level. Builds real skills, real confidence, real results.

Which is more popular?
Based on our record, CodePen seems to be more popular. It has been mentioned 513 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | codepen.io | levelupmath.com |
| Pricing | — | |
| Company | — | 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of CodePen yet.
Level Up Math is an adaptive K-8 math practice platform built for parents who want their child to make real, measurable progress. The platform starts with a brief assessment that pinpoints where each student is across the Common Core math standards, then builds a personalized learning path that...
What each product offers, as listed by its team.


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Why this product is good
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As answered by people managing CodePen and Level Up Math.
Level Up Math's answer:
Level Up Math combines three things most K-8 math tools treat separately: an adaptive assessment that maps each student's mastery against the Common Core standards, daily practice with visual manipulatives and step-by-step worked solutions, and an AI-written narrative report that tells the parent in plain language where their child is strong, where they're stuck, and what to work on next. Children practice in a focused, ad-free environment with no gamified loops competing for their attention, and the system only advances a skill once the student demonstrates real mastery.
Level Up Math's answer:
Most platforms make you choose between rigor and engagement. IXL is rigorous but reduces to endless drilling. Prodigy is engaging but buries the math inside a game. Khan Academy has great content but offers little guided practice between videos. Level Up Math sits in the middle: real Common Core practice with visual manipulatives that help the math click, immediate step-by-step explanations when a student gets stuck, and a mastery model that keeps the work in the productive zone (challenged enough to learn, not so hard it crushes confidence). Parents get an AI-generated report after the initial assessment that reads like a tutor's summary, not a dashboard of percentages.
Level Up Math's answer:
Parents of children ages 5 to 13 (kindergarten through 8th grade) in the United States, who want their child to build a strong foundation in math beyond what school provides. The two biggest segments are (a) parents whose child is in traditional school and needs supplemental practice (catching up, staying sharp over summer, or pushing ahead) and (b) homeschool families who want a structured, standards-aligned math program that adapts to each child's level. The platform is parent-led: the parent signs up, sets up the child's profile, and links a device for the child to use during practice sessions.
Level Up Math's answer:
Level Up Math started from a personal frustration. We watched our own kids, and the kids around them in their friend groups, lose interest in math because the tools meant to help them weren't actually helping. Some platforms drowned them in repetitive drilling. Others wrapped the math in so many game mechanics that the learning got lost. Parents we talked to felt the same way: they could tell their child was disengaged, but they didn't have a clear picture of what their child actually knew or what to do about it. We started talking with both the kids and the parents about what would make this better: practice that respects the student's time, visual tools that explain why a method works, and reports that tell parents what's really going on. Level Up Math is the result of building the product we wished existed for our own children, with the people it was for in the room from day one.
Share your experience with using CodePen and Level Up Math. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Codepen is a social network for developers to show off their work, ask and answer questions, and exchange ideas. It's like a Reddit for coding and design, with a large community of talented web developers.
Codepen is a social development environment that allows developers to showcase their work and experiment with HTML, CSS, and JavaScript in a collaborative space. Codepen’s focus on visual and interactive development...
Codepen is a social development environment for front-end designers and developers. Build and deploy a website, show off your work, build test cases to learn.
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Recommendations tracked on public social media and blogs since March 2021.


> I vividly remember IE and many hacks to have css elements properly working in it… The common advice now is to only use CSS that is supported in the last two major versions of each major browser. You can check any css property's support... - Source: Hacker News / about 2 months ago
Thank you, heartfelt... For sharing an artwork, a miracle! Just in case, have you considered publishing the work at platforms as CodePen, where genius Artists/People express their art, too, as you?: // https://codepen.io/. - Source: Hacker News / 3 months ago
Embed on DEV: If you prefer CodePen embed, create a Pen with that HTML and add to the post as: {% codepen https://codepen.io//pen/ %}. - Source: dev.to / 12 months ago
Tracking Level Up Math since May 2026.
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