AI Practice for the Japanese Curriculum
From School Tests to the Common Test, Unlimited AI Practice
Covering the Common Test, senior high, junior high and elementary school. AI generates unlimited questions in past-paper format and grades them the moment you submit, with an explanation of each slip, so you can practice just the topics you find hard until they stick.
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Common Test · Math I·A
Solve 2x² − 5x − 3 = 0.
x = 3 or x = ½
x = 3
x = 3 or x = −½
x = −3 or x = ½
Your factorization was right, but the negative root x = −½ is missing. We've added two similar questions to your queue.
Graded in seconds
From Elementary School to the Common Test
From elementary, junior high and senior high school tests to Common Test preparation for university entrance. Choose your curriculum to browse subjects and topics and start practicing.
At an international school?
thinka also covers IB, IGCSE and International A-Level programs.
Practice Built for Japanese Exams
Question formats and scoring criteria designed around Japanese examinations.
Questions in Past-Paper Format
AI generates multiple-choice, short-answer and essay questions modeled on real past papers, so the phrasing on exam day feels familiar.
See Exactly Where It Went Wrong
Instant grading points to the step where you slipped and explains the fix. thinka logs each weak topic, so you always know what to review next.
One Account, Elementary to University Entrance
From elementary school foundations to junior and senior high tests and Common Test preparation. Your learning history carries over as you move up the grades.
How It Works
Pick a topic, practice in the real exam format, and see where you slipped. One session, three steps.
01
Choose Your Topic
Choose the Common Test, senior high, junior high or elementary, then narrow to a subject and topic. Difficulty and question format are adjustable too.
02
Practice with AI
Questions modeled on past-paper formats are generated fresh each time, so there is nothing to memorize.
03
Get Instant Feedback
Grading works through your answer step by step and logs weak topics automatically, so you know what to review next.
Practice by Subject
Practice the subjects the Common Test and school tests actually examine, from math and English to science. Pick a subject to start.
See what's covered
Free Study Resources
100,000+
Learners on thinka
20,000+
Teachers & Parents
50+
Registered Schools
36
Subjects Covered
What Learners Say
“I do thirty minutes of Common Test math every day. The explanation shows which step I skipped, which makes reviewing far easier than when I only ever checked the answer.”
S
Sato
Senior High, Year 2
“We use it with my son before his junior high tests. Seeing which topics are weak in one list makes it easy to decide what to go over together on the weekend.”
T
Tanaka
Parent of a junior high student
Frequently Asked Questions
Last updated August 2026
Does thinka follow the Common Test past-paper format?
AI generates unlimited new questions based on Common Test question formats. The official past papers themselves are not included, so it works best once you have finished the real papers and still want more to practice on.
Can I use it for senior high school tests?
Yes. You can specify a subject and topic and adjust the difficulty, so you can drill only what your test actually covers.
Can junior high and elementary students use it?
Yes. Junior high and elementary are each their own curriculum, with questions matched to the grade and topic. Parents can follow progress from their own dashboard.
Is thinka free?
A free account includes a set number of questions each day, with no credit card required. Upgrade for unlimited practice whenever you like, and cancel at any time.
Can AI grade written and essay answers?
Yes. Answers are checked against the structure of the scoring criteria, showing which parts earned points, which are missing, and how to write it more strongly next time.
Which subjects are covered?
Core subjects including math, English, Japanese, science and social studies. Coverage varies by curriculum, so open the curricula above to check.
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