Hand someone a problem set and say "work through it," and nobody actually tells you how to cycle through it so it moves the needle. Most people just solve it in order, check the answer when they get something wrong, and move to the next question. Do that once, and call it done.
Here's the conclusion up front: that doesn't work. A problem set only really pays off based on how you carry the questions you got wrong into a second and third pass — not on the first pass itself. Here's how to actually work through passed.jp's English problem set so it sticks, step by step, with the reasoning behind each step. I'll touch on the philosophy briefly at the end; the steps are the main event.
First pass: solve everything, without timing yourself
Don't worry about your score on the first pass. If anything, go in with the mindset of solving in order to get things wrong.
passed.jp's English problem set lets you work through grade-level drills (junior-high years one through three, plus vocabulary) in batches of 5, 10, or 15 questions. On the first pass, go through these without timing yourself, and just answer with whatever comes to mind. Even on questions you don't know, guess — anything is fine. There's no need to stop and agonize.
Why does this order work? The goal of the first pass isn't "score points" — it's surfacing exactly where you don't understand something yet. Time yourself, or worry about your score, and you'll unconsciously start picking questions you can solve, which hides your actual weak spots. The first pass is deliberately rough, hitting everything. The mistakes that surface here are exactly what the rest of your study will target.
Once you finish, you'll see a score and a percentage correct. Don't worry about that number itself. What matters isn't the score — it's the record of where you went wrong, which comes next.
Don't just skim past the questions you missed
The moment you check your answers is actually where the real gap opens up.
For a question you got wrong, alongside your answer and the correct one, you get an explanation that goes as far as why you'd pick that wrong answer in the first place — the pattern behind the mistake. For example, why you'd pick the be-verb for "I" when the subject is actually third-person singular — it names the mistake itself, the one people tend to make.
Skip past this and move to the next question, and you'll repeat the exact same mistake on your second pass. The reason is simple: "memorizing the correct answer" and "understanding why you got it wrong" are two different jobs. If you only look at the answer and memorize "the be-verb is is," you'll make the same misjudgment the next time a similar sentence shows up. Only once you've put into words how you reasoned your way into the wrong answer do you stop falling into the same trap.
Once you've finished every question, there's a list view where you can line up your answers against the correct ones. From there you can go back into the explanation for any single question. Taking the extra step of scanning through this list right after the first pass changes how efficient your second pass turns out to be.
Second pass: only the questions you got wrong, once more
On the second pass, narrow it down to just the questions you missed on the first. There's no need to redo everything.
Why narrow it down? A question you got right on the first pass is one you already understand, at least for now. Spending more time there is digging in a spot with no more ground to gain. Limited time should go only to what you don't understand yet. The whole point of solving everything on the first pass was to build this narrowed-down list.
You might get some of them wrong again on the second pass. That's not a failure — it's the expected response. If reading an explanation once were enough to fully lock something in, nobody would need a review step at all. If you miss it, read the explanation again. This time, think through why you picked the same wrong answer even though you'd supposedly just read the explanation. Do this and the actual pattern of your mistake starts to show itself.
Third pass and beyond: keep narrowing until it's fully solved
The third pass works the same way. Narrow down to only the questions you still got wrong on the second pass, and solve again.
Every time you repeat this, the number of target questions should shrink. If you missed ten questions on the first pass, a healthy pattern looks like five remaining on the second pass, two on the third, and so on. If the same questions aren't shrinking no matter how many times you cycle through them, that's a sign your understanding of that unit itself is shallow — step away from memorizing the answer and go back to the basics of that unit instead.
Keep carrying forward only the ones you still miss until the count hits zero. There's no need to dutifully redo every question each time. Given the same amount of time, concentrating it on what you still can't solve gets you further.
When your weak spots cluster, hit them with the topic pages
After a few passes through the grade-level drills, you'll often start to see a pattern — "I keep missing the passive voice," or "present perfect is the one I can't get."
When that happens, use the topic-based question pages built around individual grammar points. passed.jp's English problem set has a substantial set of questions organized by unit — the be-verb, general verbs, present progressive, questions, past tense, auxiliary verbs, future tense, there is/are, conjunctions, infinitives and gerunds, comparison, the passive voice, present perfect, relative pronouns, participial constructions, indirect questions, relative adverbs, idioms, and vocabulary. Vocabulary and idioms in particular have a large number of questions, and you can use them directly to build up your word bank.
These are a faster format — tap an answer and see it color-coded as right or wrong on the spot. Take the weak unit you found through the grade-level drills and hit it hard, all at once, here. There's no need to go question by question in order; just narrow in on the page for your weak unit and repeat only that.
Use the Impact department as the final push
Once you've seriously worked through a few cycles, it's worth taking a break and browsing the "Impossible English" special section. It uses outlandish, real-event-based sentences — a quirky scam-email mistranslation, a social-media news item — to carve grammar into memory. The World Cup 2026 special questions work the same way, drawing on current events.
These aren't a substitute for the steady repetition above. Think of them as a final push for making memory last, sitting on top of the foundation you've already built through the plain, repeated cycling. The hook of "oh, that's the same shape as that weird sentence" tends to stick around longer than a flat example sentence ever will.
The cycle, summarized
Boiled down, here's what to do.
- First pass: solve every grade-level question without timing yourself. The goal is to surface your weak spots.
- For anything you get wrong, read the explanation all the way through to why you picked that specific wrong answer, not just what the right one is.
- Second pass: narrow down to only the questions you missed, and solve again.
- Third pass and beyond: keep narrowing to whatever you still miss, until nothing's left.
- Once a weak unit becomes clear, hit that unit specifically using the topic-based pages.
- Use the Impact department and current-events questions as a change of pace and a final push for retention.
What every step here shares is this: don't repeat the same work mindlessly. Surface everything on the first pass, then spend every pass after that only on what's left once you've stripped the rest away. Do just this, and the same problem set moves you far further than it otherwise would.
One last thing. Studying — English or otherwise — doesn't end the moment you pass. When you're on the other side of passing and someone actually needs to rely on what you know, whether it holds up comes down to this unglamorous cycle, repeated. Chipping away one wrong answer at a time, not a flashy shortcut, turns out to be the fastest way there in the end.
