# How to Make a Family Tree Diagram for School (Step by Step)

Canonical: https://sakura5.app/blog/how-to-make-a-family-tree-diagram-for-school/  
Published: 2026-10-25  
Author: the Sakura5 team · 8 min read  
Updated: 2026-10-25  
Publisher: Sakura5 (https://sakura5.app) · support@sakura5.app

> **TL;DR:** How to make a family tree diagram for school without a messy poster: list, sort by generation, draft, then draw. Full 11-person Year 6 example inside.

![How to Make a Family Tree Diagram for School (Step by Step)](https://sakura5.app/img/blog/inline/how-to-make-a-family-tree-diagram-for-school-1.jpg)

To make a family tree diagram for school, list every relative the assignment asks for, sort them into generations, put the oldest generation at the top (or yourself at the bottom), draw one box per person with a line joining each couple and a line dropping from that couple to their children, then check the whole chart against your list before you copy it neatly. That’s the entire method. Everything else is about getting the names right and fitting the chart on one page.

Most students lose marks on a family tree for reasons that have nothing to do with drawing: a missing grandparent, a cousin in the wrong generation, a chart that runs off the poster. All of those are fixable before you pick up a marker.

This guide walks through why the first attempt usually goes wrong, a six-step method that works for any grade, a full worked example for a three-generation project, how to handle the awkward cases (divorces, step-families, adoption, unknown names), and a quicker way to draft the structure on your phone or Mac before committing it to paper.

## Why the first draft of a family tree usually goes wrong

The natural instinct is to start drawing straight away. It works for about four people. By the time you reach your dad’s three siblings, one side of the page is crowded and the other is empty.

Three things cause nearly every messy tree:

- **No list first.** You discover relatives while you draw, so each new name has to be squeezed in instead of planned for.
- **Generations drift.** An aunt ends up level with your grandparents because that’s where the space was. On a family tree, height means generation, so a misplaced box reads as a factual mistake.
- **Lines do two jobs.** A family tree has two kinds of connection — partners side by side, children below — and when both look the same, nobody can read the chart.

The fix is to treat the tree as two tasks: organise the information, then draw it.

## How to make a family tree diagram for school, step by step

This works whether the assignment is a simple three-generation chart for primary school or a five-generation project for a history class.

![How to make a family tree diagram for school, step by step — how to make a family tree diagram for school](https://sakura5.app/img/blog/inline/how-to-make-a-family-tree-diagram-for-school-2.jpg)

*“Three generations” usually means you, your parents and your grandparents.*

### 1. Read the brief and decide the scope

Check exactly what the teacher wants: how many generations, whether siblings, aunts, uncles and cousins count, and whether dates or photos are required. “Three generations” usually means you, your parents and your grandparents.

### 2. Interview one relative with a written list

Pick the person in your family who knows the most — often a grandparent — and ask for full names, birth years, and where each person was born. Write everything down in a plain list grouped by side of the family. If a fact is uncertain, mark it with a question mark rather than guessing.

### 3. Sort the list into generations

Give every person a generation number. You and your siblings and cousins are generation 1, your parents, aunts and uncles are generation 2, grandparents are generation 3. Every box with the same number goes on the same row.

### 4. Count the widest row

Count the people in each generation. The row with the most people decides how wide each box can be. If your generation 2 has eight people across both sides, divide the width of your paper by about nine (a little space between boxes) and that’s your box width.

### 5. Draft the structure before the final copy

Sketch the tree roughly in pencil, or build it digitally, so you can move whole branches around without redrawing. Put your mum’s side on one half and your dad’s side on the other, with your parents meeting in the middle. Couples sit side by side joined by a short horizontal line, and a vertical line drops from the middle of that line to a bar above their children.

### 6. Make the final copy and check it against the list

Copy the draft neatly, then tick off each name on your original list as you find it on the chart. Any name without a tick is missing. Add a small key if you use symbols, such as a dashed line for step-relationships, and a title like “The Okafor Family Tree, 1940–2026.”

## A worked example: an 11-person tree for a Year 6 project

Take Maya, aged 11, whose teacher has asked for a three-generation family tree on an A3 poster, including siblings, aunts and uncles, with each person’s first name, surname and birth year.

![A worked example: an 11-person tree for a Year 6 project — how to make a family tree diagram for school](https://sakura5.app/img/blog/inline/how-to-make-a-family-tree-diagram-for-school-3.jpg)

*After a 20-minute phone call with her grandmother, Maya has 11 people.*

**The list.** After a 20-minute phone call with her grandmother, Maya has 11 people. Generation 1: Maya and her younger brother Leo. Generation 2: her mum Grace, her mum’s sister Ruth, her dad Daniel, and her dad’s two brothers, Sam and Peter. Generation 3: four grandparents, two on each side. Her grandmother isn’t sure of one grandfather’s birth year, so Maya writes “c. 1952” next to it.

**The widest row.** Generation 2 has five people, but Grace and Daniel need to sit next to each other in the middle, so Maya plans the row as Ruth, Grace, Daniel, Sam, Peter. An A3 sheet in landscape is 420 mm wide, so with five boxes and a margin she gives each box about 65 mm.

**The layout.** Generation 3 goes on the top row: mum’s parents above Ruth and Grace, dad’s parents above Daniel, Sam and Peter. Generation 2 sits in the middle row. Maya and Leo go on the bottom row, centred under the line joining Grace and Daniel. Three rows, 11 boxes, nothing squeezed.

**The check.** Ticking the list against the draft, Maya finds she has left Uncle Peter off — his box was on the list but she ran out of room on the right while sketching. Because she drafted first, she moves Sam left by one box and fits Peter in.

The draft is the part worth speeding up. In [Mindmap AI](https://sakura5.app/mindmapai/) you can put the family name at the centre, add one branch per side of the family, and hang each generation off those branches, then drag whole branches around the canvas until the shape balances. The outline view lists everyone in order, which makes the tick-off check in step 6 quick. You type the names yourself — the app doesn’t know your family — but rearranging a branch takes a second instead of an eraser.

## Awkward cases teachers see every year

Real families rarely fit the textbook diagram. Teachers mark clarity, not a particular family shape.

### Divorce and remarriage

Show both partnerships. Put the parent in the middle with each partner on either side, and use a line with a short break or a double slash to mark a divorce. Children sit under the partnership they belong to, which makes half-siblings clear without any explanation.

### Step-families and adoption

Use a dashed line for step-relationships and say so in the key. For adoption, a solid line is usually what families prefer; if you want to mark it, a small note under the name is gentler than a different line style.

### Unknown or missing relatives

Leave the box and write “unknown” or just a first name. A labelled empty box shows you understood the structure.

### When you can’t or don’t want to share family details

Some students live with foster families, have lost contact with a parent, or simply find the project uncomfortable. Many teachers will accept a tree of a famous family, a fictional family from a book, or a “family” of the people you live with. It’s worth asking quietly; the skill being marked is the diagram, not your private history.

## Paper, poster or digital: which to choose

For primary school, a hand-drawn poster with a pencil draft is enough.

For secondary school projects with four or more generations, a digital draft pays off. A mind map is a good drafting tool here because a family tree is already a branching structure: each side of the family is a branch, and each generation is a level. Our guide to [example mind maps for students](https://sakura5.app/blog/example-mind-map-for-students/) shows how the same branch-and-level thinking works for revision maps.

A mind map won’t draw the formal partner lines a genealogy chart uses, so treat it as the planning layer and copy the final version onto your poster or into a slide. If you want to see how professional genealogists lay out pedigree charts and descendant charts, the [FamilySearch Research Wiki](https://www.familysearch.org/en/wiki/Pedigree_Chart) has clear examples of both formats.

If the teacher wants a printed handout as well as the poster, [Mindmap AI](https://sakura5.app/mindmapai/) with Pro can export the map as a multi-page PDF outline — useful as a reference sheet of every name and date when you present.

## FAQ

**How many generations should a school family tree have?**

Most school assignments ask for three generations: you, your parents, and your grandparents. Older students are sometimes asked for four or five. If the brief doesn’t say, three is the safe default, and including siblings, aunts and uncles makes the chart fuller without making it much harder to draw.

**Should the oldest generation go at the top or bottom?**

Either works, but put the oldest generation at the top unless your teacher says otherwise. Top-down trees read like a timeline, which most people find natural. A tree drawn literally, with you as the trunk at the bottom and ancestors as branches, looks attractive but is harder to fit on a page.

**What do I write in each box of a family tree?**

At minimum, each box needs a full name. Most teachers also want a birth year, and older students often add a birthplace or year of death. Keep the format identical in every box, such as first name, surname, then year, so the chart looks tidy and the reader can compare people at a glance.

**How do I show a married couple on a family tree?**

Place the two partners side by side on the same row and join them with a short horizontal line. Draw a vertical line down from the middle of that line to a horizontal bar, then drop a short line from the bar to each child. Using this one rule consistently makes the whole tree readable.

About the app: [MindMap AI: Mind Map Maker](https://sakura5.app/mindmapai/) · App Store: https://sakura5.app/go/mindmapai?from=/blog/how-to-make-a-family-tree-diagram-for-school/