What is the best coding class in Tullamore?
Of Tullamore's 5,601 households, 4,530 report broadband, which is the whole of the equipment list apart from a computer. Our teachers take a live lesson over video with a few learners working at the same level, or with one learner on their own, about twice a week, for any age from six to sixty-seven. The opening lesson costs nothing. A group place is then USD 100 a month and private teaching USD 150.
The Central Statistics Office prints a single number for how old Tullamore is: an average age of 38.1. Underneath it sits a table counting the town's people by age, one row per year up to nineteen and then five-year bands, ending in an open row for everyone aged 85 and over. This page rebuilds the one from the other, the way a careful analyst checks any figure before quoting it. The totals agree. The average only comes out right if each person is counted at the middle of their year of age, not at the birthday just gone, and that single discovery is the reason to do the exercise. Then the same program runs across all 867 census towns, and the pattern of its misses shows what grouping ages into bands throws away. Every number below came from running it.
Facts last verified 19 September 2026. Teaching is online; no Tullamore branch is claimed.
Start from age and interest; the first lesson, taken by the course teacher, confirms the level.

Block coding where sorting things into boxes and counting them is part of the game.
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Averages, rounding and tables worked out by a program the learner writes, then checked by hand.
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Real census tables in Python, and the habit of rebuilding a published number before trusting a chart.
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For adults who report figures at work and want to know how each one was made.
See the syllabusBrowse the course atlas for more than one hundred options and use the coding roadmap to check prerequisites.
The four we are known for
These run underneath everything above. Every one is live and online, placed by ability rather than by age, and the first class is free.

Python, web and AI projects where the learner still owns the thinking.
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Automate the work you already do, then let AI carry part of it.
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Train a model, read what it learned, and be able to say why it is wrong.
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Run AI coding agents on real work without losing control of the codebase.
See the syllabusThe published figure is 38.1. The age table for the same town has 34 rows. Four steps get from the rows to the figure, and one of them decides whether it can be done at all.
| Oldest row at | Completed years | Middle of year | Gives 38.1 |
|---|---|---|---|
| 87 | 37.62 | 38.11 | Middle |
| 88 | 37.63 | 38.13 | Middle |
| 89 | 37.65 | 38.14 | Middle |
| 90 | 37.66 | 38.16 | Neither |
Counting in completed years, no believable guess about the oldest row reaches 38.1: the 230 people aged 85 and over would need an average age of 116 to 123. Counting at the middle of the year, any average for that row from 85 up to about 89.6 rounds to the published figure.
At the middle of the year, with the oldest row set at 88, 517 of the 867 towns come out exactly at their published average age, and 820 land within a tenth of it. Completed years reproduces none of the 867, whichever of the four values is used for the oldest row.
Of the 350 towns that miss at all, 170 are rebuilt too high and 180 too low. A wrong method would push nearly all of them one way. A scatter on both sides is what grouping costs when the method is right.
A reproduction is an experiment, not a formality. If every rebuilt value comes out low by about half a year, the method differs from the publisher's, and here the fix is to count ages at the middle of the year. If the misses fall on both sides of the target in roughly equal numbers, the method matches and the gap is information the table never contained. Knowing which of the two you are looking at stops the two classic mistakes: blaming the publisher for your own convention, and fiddling with a correct method to chase a rounding difference.
In code the whole exercise is small. The learner writes one function that takes the band edges, the counts, a convention and a value for the open row, and returns an average. A second function rounds it to one decimal and compares it with the published figure. A loop sends all 867 towns through both and tallies exact matches, near misses and the direction of every miss. The table above is that program run on one town; the three findings are the same program run on every town. The learner then changes one thing at a time, the convention or the value for the oldest row, and watches the tally move, which is how a guess about how a number was made becomes evidence.
The towns that miss by more than a tenth are not random. Two of the largest misses show the two ways a band loses detail.
| Town | Population | Aged 85 and over | Rebuilt | Published |
|---|---|---|---|---|
| Tyrrellspass, Co Westmeath | 480 | 51, one in ten | 49.91 | 50.3 |
| Ballynoe, Co Cork | 211 | none | 36.23 | 36.0 |
| Tullamore, Co Offaly | 15,598 | 230 | 38.13 | 38.1 |
In Tyrrellspass 51 of 480 people sit in the row with no upper edge. Whatever single age is assumed for them moves the whole town's average, and the table gives no way to choose it. The open row is one of two sources of error, and it weighs most where, as here, it holds a large share of the town.
Nobody in Ballynoe is 85 or over, yet the rebuilt average is 0.23 years out. The five-year bands are the reason: 211 people spread across bands five years wide can sit near the top or the bottom of each, and the midpoint guess can be off in the same direction several times over.
The towns that reproduce exactly have a median population of 772, the towns that miss about 440, and the 47 that miss by more than a tenth just 238. In a large town the errors inside each band tend to cancel, which is why Tullamore, with 15,598 people and 230 in the oldest row, comes out right for any average in that row from 85 to about 89.6.
What this page does not claim
The rebuild shows that the published averages behave as if ages were counted at the middle of the year. It does not show how the CSO computed them, and nothing here says the published figures are wrong: the misses are the size and the pattern that grouping alone would produce.
Published for the town Tullamore, Co Offaly, in the Census 2022 small area tables. Each table counts its own population, which is why two different totals appear.
| Counted | Number |
|---|---|
| Usual residents, birthplace table | 15,412 |
| Population, age table | 15,598 |
| Households | 5,601 |
| Households with broadband | 4,530 |
| Working residents in the travel table | 6,457 |
| Journeys to school, college or childcare | 3,833 |
| Children under fifteen in childcare | 869 |
| Aged 85 and over | 230 |
Of 6,457 working residents, 3,517 drive, 859 walk, 442 give home as the main answer, 381 ride as a car passenger, 346 go by van, 210 cycle, 146 take the train and 57 the bus.
Of 3,833 journeys to school, college or childcare, 1,772 are made as a car passenger, 760 on foot and 580 by bus, with 98 learners driving themselves, 85 cycling and 77 on the train.
Asked the question directly, 1,353 working residents do at least some of their work from home, 4,349 never do and 755 left it blank.
Two named places
Irish Rail gives the station address as Iarnród Éireann, Kilcruttin, Tullamore, Co. Offaly, Eircode R35 RY63, and says sheltered bike parking is available there. The HSE lists Midland Regional Hospital Tullamore at Arden Road, Tullamore, Offaly, R35 NY51. Neither has any connection with us.
A fixed hour on two days of most weeks, with the teacher live for all of it.
The census counts 1,581 children aged six to twelve in the town. They start with block code, games and puzzles, and meet averages as something a program can work out.
For the 1,266 aged thirteen to eighteen: Python, websites, data and AI projects, including real census tables from the junior cycle on.
Retired, working shifts or back at a desk after years away, adults start from wherever they are, including from nothing, and the first lesson places them.
Census counts are Central Statistics Office figures printed as published, and every rebuilt average on this page came from running the reconstruction over the published age table and table F1015 on 19 September 2026. Irish Rail and the HSE are quoted from their own pages and have no link with us.
Ages are a starting guide; the first lesson finds the real level.
Block-coded games that sort things into groups and count them, the first step towards any table.
Coding for KidsScratch Coding for KidsWriting code that works out an average, then checking it by hand and finding out when the two disagree.
Maths Through CodingPython and AI for KidsLoading real tables in Python, reproducing a published figure and explaining any gap.
Data Science for TeensAI and Machine Learning for TeensTracing a figure at work back to its table, and saying plainly what it can and cannot support.
Data Analysis CourseData and AI Analytics for Non-Programmers (Excel, Sheets, Power BI)It will answer quickly. Whether the answer is the CSO's depends on a choice it will not mention.
Ask an AI assistant to work out the average age from the census bands and it will write correct-looking code in seconds. It has to decide how to count a person who is 38, and nothing in a short request tells it what the CSO did, so it picks. If it picks completed years it prints about 37.6 for Tullamore, confidently, half a year short of the published 38.1.
A learner who has done this project asks for the code, runs it, compares the result with the published figure and notices which way it misses. A miss in one direction for every town is a method problem, and the fix is a change of convention, not a change of data.
The arithmetic is cheap now. Knowing which arithmetic produced a published number still takes a person who checks. The longer argument is in why learning to code keeps its worth.
The arrangements, in brief.
A teacher runs each lesson in real time and responds to the code in front of the learner.
Five to ten learners at one stage, drawn from Offaly, the rest of Ireland and other countries.
About eight lessons a month, on days and at an hour agreed at the start.
The plan allows for mid-terms, holidays and the weeks before exams.
A keyboard and a screen wide enough for code beside a video window, a headset or speakers with a microphone, and the ordinary home broadband that 4,530 households here already have.
Some learners are taught on their own, usually because the group at their level meets when they cannot, or because they are ahead of every group running.
Nothing to travel to
Lessons reach Tullamore over video only. There is no classroom in the town, and the same lesson reaches Clara, Kilbeggan or anywhere else with a connection.
All of it, in one place.
A complete first lesson with a level assessment, at no charge.
A month in a group of five to ten at the same stage, about eight live lessons.
A month of one-to-one lessons on the same weekly pattern.
Nothing is owed for the opening hour; the month begins when the first paid lesson does, at the one US dollar rate used for every country outside India, and the pricing page sets out what happens over holidays, after a missed lesson or on moving between group and private.
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Tell us the learner's age and what they enjoy, and the first hour is planned around it. It may end with a game, a first program, or an average that finally matches the published one.
The questions Tullamore families put to us first.
It depends which census table is asked, and both answers are official. The age table and the published town population give 15,598; the birthplace and citizenship tables count 15,412 usual residents. The town has 5,601 households.
Rebuilding the published average age of Tullamore, 38.1, from the age table. It only comes out right when each person is counted at the middle of their year of age, and the same program then reproduces 517 of the 867 census towns exactly to one decimal.
Because the table groups ages into bands and ends in an open row for 85 and over, so detail is gone before the calculation starts. Of the towns that miss, 170 come out high and 180 low, which is what lost detail looks like rather than a wrong method.
Of the 6,457 working residents in the travel table, 3,517 drive, 859 walk, 442 work mainly at or from home, 381 are car passengers, 346 use a van, 210 cycle and 146 take the train.
After school, in the evening and at weekends. Lessons land in our teachers' evening, four and a half hours later on the clock than yours while Ireland is on summer time and five and a half later in winter, and we agree an hour that suits both seasons.
No. Learners up to sixty-seven join us, often with no coding behind them, and after the first lesson they either join a group at their level or continue one to one.
Yes. Lessons are online, so a learner in Clara, Kilbeggan or a farm outside Tullamore gets the same class, and groups are formed by level rather than address.
No, and we never imply one. Teaching is live over video only, with no premises in Ireland. A learner needs a laptop or desktop, working sound and a steady connection, and the number shown here belongs to India.
The first lesson is free. After that a shared place costs USD 100 a month and brings two live lessons a week, about eight monthly, with five to ten learners; one to one on the same schedule is USD 150 a month. Everything is agreed before payment.
Five to ten, grouped by ability, pace and goal rather than age or address. Where nothing suitable meets at a workable hour, we teach one to one instead.
Next door in the series are the County Offaly page and the midland town pages for Portlaoise, Mullingar and Athlone, all within Leinster. For a side-by-side look at online coding schools there is a separate comparison, and every county and town in the series is listed from the Ireland hub.