Sprocket City turns eighth grade math practice into a build: your child reads a question, taps the answer, and a right answer wins a gear for their helper bot. Every finished job adds a building to their own Sprocket City. Every task is tied to a California math standard for eighth grade. Free in any browser, with no account, no sign-up, and no ads.
Every question is tagged to the California math standard it practices, so you can see exactly what is being practiced.
| Skill | Standard |
|---|---|
| Properties of integer exponents | 8.EE.A.1 |
| Square roots and cube roots | 8.EE.A.2 |
| Approximate irrational numbers | 8.NS.A.2 |
| Scientific notation estimates | 8.EE.A.3 |
| Operations in scientific notation | 8.EE.A.4 |
| Linear equations in one variable | 8.EE.C.7 |
| Slope and y = mx + b | 8.EE.B.6 |
| Functions: inputs and outputs | 8.F.A.1 |
| Linear vs nonlinear functions | 8.F.A.3 |
| Systems of linear equations | 8.EE.C.8 |
| Scatter plots and association | 8.SP.A.1 |
| Transformations on coordinates | 8.G.A.3 |
| Angle facts: triangles and parallel lines | 8.G.A.5 |
| Pythagorean theorem | 8.G.B.7 |
| Volume of cylinders, cones, and spheres | 8.G.C.9 |
Sprocket City is untimed by default. A clock appears only if you switch on Challenge mode, and it never blocks progress, because timed drill is associated with math anxiety rather than fluency. Every question can be read aloud in English or Spanish, there is a calm mode with fewer effects, and an errorless mode for the youngest learners. The progress report shows mastery by standard, time on task, and which skills are due for another pass, and it prints in English or Spanish.
Yes. Every grade, job, and feature is included with no account and no personal information required. There are no ads and no in-app purchases anywhere in the game.
Yes. It runs in Chrome with no installation, or installs as an app from the browser menu. It works offline after the first load.
Yes. One tap switches every screen, question, and coaching message to Spanish, and questions can be read aloud in either language.
Calm mode, errorless mode, larger targets, keyboard and switch play, text scaling, spaced text, and read-aloud are all built in. The teacher dashboard exports per-standard progress monitoring data as a CSV.
The table on this page lists every standard practiced in this grade. The game practices many of each grade's standards, not all of them yet, and every question shows its standard code.