Ktosat

Welcome back

Sign in to see our learning apps.

? √ +
Grades 6–8 Grammar and math practice

Short, timed sprints that turn grammar and math into a game.

Every level comes straight from our workbooks. Students pick a topic, race the clock through one sprint, and see exactly what to fix before the next one.

Free to try in any browser · no sign-up · nothing to download
Try it here →
1,640grammar questions
1,337grade 8 math questions
167timed levels
51topics with help tips
The apps

Two apps, one simple loop

Both apps work the same way, so a student who learns one already knows the other.

Grammar Master

Grades 6–8 · 82 levels

From sentence basics to verb tenses and punctuation. Read-aloud helps students who learn by listening.

Play now33 topics

Math Sprints

Grade 8 · 85 levels

Equations, exponents, radicals and geometry. Students type answers on a built-in keypad with fraction, √ and π keys.

Play now18 topics
How it works

Practice in three steps

1

Pick a topic

Each topic card shows its levels, your stars, and the key rules to remember.

2

Beat the clock

A level is one workbook sprint of 10 to 20 questions, with a timer running.

3

Fix your mistakes

Every answer gets instant feedback. The results screen reviews each mistake with the right answer.

💡
Help on every question

Short rules and a worked example for each topic.

🔊
Read-aloud

Questions and answer choices are read out loud.

⭐
Stars and streaks

Up to three stars per level, plus a daily streak.

📱
Any device

Phones, tablets and laptops. Progress stays on the device.

Ready to try a level?

Pick an app and play any of the 167 levels.