The Grade Eleven Tuck Shop That Kept Losing Forty Rand a Day

The Shortfall on the First Friday

The first Friday our tuck shop closed its books, we were forty-three rand short.

The second Friday, we were thirty-eight rand short. The third, fifty-one. By the end of the first month I had a Grade Eleven class that was quietly accusing each other of theft, a principal who had started raising his eyebrows at me in the staff room, and a biscuit tin full of coins that never, ever matched the exercise book we used to record sales.

I teach business studies at a high school in Polokwane. I have done so for fourteen years. Every year I try to make the subject feel real to children who mostly think a business is something that happens to other people, in Sandton, on television. That year I had a proper idea. The school's old tuck shop, a converted storeroom with a sliding hatch onto the quad, had been closed since the woman who ran it retired. I asked the principal if my class could run it as a project for the whole year. Profits, if there were any, would go towards the matric farewell.

He said yes, with the expression of a man agreeing to something he expected to regret. He was not entirely wrong.

Twenty-Six Shopkeepers

My class split itself into teams. There was a buying team that went with me to the wholesaler on Saturdays. A pricing team that argued for a week about whether a packet of chips should cost eight rand or nine. A marketing team that made posters with a lot of glitter. And a till team, rotating in pairs, who sat behind the hatch at first and second break and took the money.

The till was an exercise book and a biscuit tin. Every sale was meant to be written down. Two chips, one juice, one lollipop. At the end of the day the team would count the tin and compare it with the book.

It never matched.

The Week Everyone Stopped Trusting Everyone

The thing about forty rand is that it is not enough to be a crime and too much to be a mistake. It sat in the classroom like a smell. Children who had been friends since Grade Eight stopped sitting together. A quiet boy named Tshepo, who was on the till team on Tuesdays, came to me after class nearly in tears because someone had written "THIEF" on his desk in Tippex.

I knew Tshepo had not taken anything. I also knew I could not prove it, and neither could he, and that was the whole problem. The exercise book could not prove anything. It only recorded what tired teenagers remembered to write down while forty other teenagers were shouting orders through a hatch the size of a microwave.

That afternoon I sat in the empty tuck shop with the tin and the book and tried to reconstruct one day. I could not. There were sales written without prices. Prices written without items. A note in the margin that just said "Lerato owes 5." A line crossed out so hard the pen had gone through the page.

I realised the children were not stealing. They were drowning.

A Lesson I Had Been Teaching Wrong

For fourteen years I have taught a chapter on internal controls. Separation of duties, reconciliation, audit trails. I have set exam questions about them. I could recite the definitions in my sleep. And here I was, running a real business with real money, using a system I would have failed a learner for proposing.

My brother-in-law, Kgabo, runs a small hardware shop in Seshego. I phoned him that night and told him the whole saga, expecting sympathy. Instead he laughed for a long time.

"You are trying to catch a thief," he said. "You do not have a thief. You have a counting problem. Nobody can count in a rush. That is why I stopped using my exercise book in 2019."

He told me that a proper point of sale system had saved his sanity, not because it made him rich but because it stopped him lying awake wondering which of his two employees he should fire. Once every sale was captured as it happened, he said, the arguments simply ended.

I sat with that for a long time. Then I took it to the class.

The Debate About Machines

I want to be honest that I did not walk into class the next day with a solution. I walked in with a question. I wrote it on the board: "Is our problem a people problem or a system problem?"

The debate was the best lesson I taught all year, and I did not teach it. They did.

Lerato, who was on the pricing team and very sure of herself, argued that it was a people problem and we just needed to be stricter. Tshepo, still raw, said quietly that nobody can be strict when forty people are shouting. A boy named Junior said his uncle's spaza used a tablet that added everything up and printed a little slip. A girl at the back, Mpho, who rarely spoke, asked how much one of those actually cost and whether it was worth it for a tuck shop that made maybe six hundred rand a day.

That question turned into a two-week research project. The marketing team abandoned glitter and started comparing options. They phoned around. They put together a presentation, which they delivered to the principal, of all people, in his office, wearing their blazers buttoned to the top.

I mostly stood at the back and tried not to cry with pride.

What Changed When the Numbers Became Visible

With the principal's grudging blessing and a small amount from the farewell fund, we set up a simple pos system on a tablet at the hatch. I will not pretend it was perfect. The first morning, it froze while a queue of Grade Eights rattled the hatch for their lollipops, and Junior had to restart it while I handed out sweets on credit from memory.

But by the second week, something remarkable happened. Every sale went onto the screen as it was made. At the end of each break, the till team could see what had been sold. At the end of the day, the count matched, or came within a rand or two. When it did not, we could look at the list and find the moment it went wrong. Usually it was a twenty-rand note mistaken for a ten in the rush.

Nobody was a thief. Nobody had ever been a thief.

The Tippex on Tshepo's desk got scrubbed off. Nobody apologised to him exactly, but Lerato started sitting next to him in class, which is how teenagers apologise.

The Numbers They Started Asking About

The real change, though, was not that the money balanced. It was that the class started asking better questions.

Now that they could see sales by item, they noticed that juice sold out by second break on hot days and that nobody bought the expensive muffins on Mondays. They noticed that Fridays were their biggest day and moved the wholesaler run to Thursday afternoons. They noticed that a particular brand of chips made them almost twice the margin of another and argued about whether to stop selling the cheaper one, which most of the younger children preferred.

That last argument turned into a discussion about whether a school tuck shop should maximise profit or serve its customers, which turned into a discussion about ethics, which turned into the best essay question I set all year.

The Farewell

By the end of the year the tuck shop had made a little over eleven thousand rand. It paid for the hall decorations, the sound system and a photographer for the matric farewell the following year.

At the farewell, Mpho, the quiet girl who had asked how much a till cost, gave a short speech on behalf of the class. She said that the most important thing she had learned in business studies was that people behave better when they can see what is happening. Then she sat down, mortified, and everyone cheered.

A colleague from another school asked me recently whether it was really worth putting a pos point of sale system into a school tuck shop, or whether it was overkill for teenagers selling chips. I told her it was never really about the chips. It was about Tshepo's desk. It was about the difference between a classroom full of suspicion and a classroom full of people asking why the muffins were not selling.

I still teach the chapter on internal controls. Now I start it with a photograph of an old exercise book, the one with "Lerato owes 5" in the margin. The children always laugh. Then I tell them what it cost us.