Sprocket City turns second 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 second 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 |
|---|---|
| Fluently add and subtract within 20 | 2.OA.B.2 |
| Even and odd numbers | 2.OA.C.3 |
| Count within 1000; skip-count by 5s, 10s, 100s | 2.NBT.A.2 |
| Hundreds, tens, and ones | 2.NBT.A.1 |
| Compare three-digit numbers | 2.NBT.A.4 |
| Fluently add and subtract within 100 | 2.NBT.B.5 |
| Measure length with tools | 2.MD.A.1 |
| Tell time to the nearest five minutes | 2.MD.C.7 |
| Money word problems with coins and bills | 2.MD.C.8 |
| Picture graphs and bar graphs | 2.MD.D.10 |
| Recognize shapes by attributes | 2.G.A.1 |
| Add and subtract within 1000 | 2.NBT.B.7 |
| Mentally add or subtract 10 or 100 | 2.NBT.B.8 |
| One- and two-step word problems within 100 | 2.OA.A.1 |
| Arrays as repeated addition (up to 5 by 5) | 2.OA.C.4 |
| Partition shapes into halves, thirds, fourths | 2.G.A.3 |
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.