10 Sep 2026 · 9 min read · Santhosh Sir

Overseer Gr.II and Gr.III — a realistic 90-day plan

Ninety days is enough to pass this exam, and nowhere near enough to study all of it. So the plan is really a plan about what to leave out — which is the part most study plans refuse to say.

First, the arithmetic nobody does

90 ദിവസം കൊണ്ട് എല്ലാം പഠിക്കാൻ കഴിയില്ല. അതാണ് സത്യം.

The ITI Level course carries 514 chapters. In ninety days, studying properly for three hours on weekdays and more at weekends, you will get through a fraction of that with any depth.

So every honest 90-day plan is a plan about selection. Any plan that implies you will cover everything is either assuming you already know most of it, or is not being straight with you.

That is not bad news. The exam does not reward coverage — it rewards marks, and marks are not spread evenly across the syllabus.

Do this before you plan anything: measure the paper

Take four or five recent question papers for the post you are sitting. Go through them with a tally sheet and count how many questions came from each subject. It takes an evening.

You will find something uncomfortable and extremely useful: the subjects students spend the most time on are frequently not the subjects carrying the most marks. Effort tends to follow what is interesting, or what someone taught well once, rather than what the paper weights.

Three hours on a subject worth three marks and one hour on a subject worth twelve is not hard work. It is expensive work.Santhosh Sir

That tally is your plan. Everything below is just a shape to pour it into.

The shape: three blocks of thirty days

Days 1–30 · The heavy subjects, taught properly

Take the top three or four subjects from your tally and do nothing else. Full study, in order, no skipping to the interesting chapters.

The rule for this block: you do not move on from a chapter until you have answered questions on it and read the explanations. Watching a chapter is not finishing it. If that means you cover fewer chapters than you hoped, you have learned something true about your pace, in month one, when it is still cheap to know.

Working from a chapter list rather than a feeling. What you have not opened is visible as something you have not opened.
Working from a chapter list rather than a feeling. What you have not opened is visible as something you have not opened. See the ITI Level course →

Days 31–60 · The next tier, plus the first real papers

Add the middle-weight subjects. At the same time, start sitting past papers under a clock — not for the score, but for two other reasons.

Expect the scores to be discouraging in this block. They are supposed to be. A first past-paper score in week five is a measurement, not a verdict.

Days 61–90 · Revision, mixed practice, and the weak list

Almost no new chapters in this block. If you are still learning new material in week twelve, the plan went wrong in week two and the answer is not to cram — it is to protect the subjects you have already built.

This block is three things on rotation: mixed practice across subjects (never one topic at a time), full papers under exam conditions, and systematic work on whatever your weak list says.

The weak list should not be a feeling. Three chapters below par is an instruction; "I'm not confident in estimation" is not.
The weak list should not be a feeling. Three chapters below par is an instruction; "I'm not confident in estimation" is not.

The weekly rhythm inside all three blocks

WhenWhatWhy it is there
Weekday eveningsNew chapters — study, then questions on that chapterThe main engine. Questions the same evening, not later.
One weekdayNothing new. Revisit last week's chapters cold.Spacing. This is the session people cut first and should cut last.
SaturdayMixed practice across everything covered so farBuilds the discrimination the paper actually tests.
SundayOne past paper, timed, with negative marking appliedCalibration, and the only true readiness signal you have.
Sunday, laterRead every wrong answer's explanation. Update the weak list.The single highest-value hour of the week.

That is five commitments, not seven. The two unclaimed evenings are deliberate — a plan with no slack fails the first week something goes wrong, and then it is abandoned rather than adjusted.

What a study evening actually looks like

"Three hours of study" is not a plan, and it is usually how two hours of reading and one hour of scrolling get recorded. A useful evening has a shape:

Notice that roughly half the time goes on material you have already seen. That ratio feels wrong and is correct.

The last week

The final seven days have their own rules, and most of them are about restraint:

Two cases where ninety days is not enough

I would rather say this than sell you something that will not work.

Neither case is a reason to stop. Both are reasons to change the target rather than pretend the calendar is longer than it is.

If you take one thing from this

Not the block structure — you can find that anywhere. Take the tally sheet. Spend one evening counting what the paper actually asks for, then let that decide where your ninety days go.

It is the cheapest hour in the entire preparation, and almost nobody spends it.

See the ITI Level courseFree 2-day demo

Chat