Understanding the coordinate grid with x-axis (horizontal) and y-axis (vertical), and how to describe positions.
Where your child meets this in real life: Reading maps, understanding game boards like chess or battleships
SEAGReady breaks understand coordinate grids into 2 steps, taught in order so each skill builds on the last.
Identify the x-axis (horizontal), y-axis (vertical), and origin on a coordinate grid
Understand that positions are written as (x, y) where x is the horizontal value and y is the vertical value
Three free sample questions from our understand coordinate grids course. Every question comes with a full explanation, and hints that guide without giving the answer away.
Ciara is learning to play Battleships. Her teacher explains that the grid has two axes. Which axis goes across horizontally?
Answer: B. The x-axis
The x-axis is the horizontal axis that goes across. Memory trick: 'x' is a cross - you walk aCROSS. The x-axis runs from left to right. Answer: The x-axis
Stuck? Start here: Think of the memory trick: 'x' is a cross, you walk aCROSS.
Finn is playing a treasure hunt game. The clue says the treasure is at (4, 7). Which number tells Finn how far across to go?
Answer: B. 4
In coordinates (x, y), the first number is the x-value. The x-value tells you how far across to go (horizontal). In (4, 7), the x-value is 4. Finn goes 4 units across. Answer: 4
Stuck? Start here: Coordinates are always written as (x, y). Which number is first?
Oisin is looking at a coordinate grid in his maths book. Which axis goes up and down vertically?
Answer: A. The y-axis
The y-axis is the vertical axis that goes up and down. Memory trick: 'y' reaches up to the skY. The y-axis runs from bottom to top. Answer: The y-axis
Stuck? Start here: Think of the memory trick: 'y' reaches up to the skY.
This is the exact interactive worked example your child sees in SEAGReady. Step through it and watch the method build up.
Ciara is learning to play Battleships with her friend Oisin.
Which axis goes across horizontally, and which goes up vertically?
Step 1 of 5
Ciara is learning to play Battleships with her friend Oisin.
Which axis goes across horizontally, and which goes up vertically?
The x-axis goes across, y-axis goes up, they meet at the origin.
The key insight: Remember: 'x' is a cross - you walk aCROSS. 'y' reaches up to the skY!
Watch out: The y-axis goes across and the x-axis goes up. This is backwards! x before y, 'across' before 'up'.
These are the misconceptions we see most often in understand coordinate grids, including the ones our practice questions are specifically designed to catch.
SEAGReady finds the exact step where your child gets stuck, teaches it with worked examples like the one above, and brings it back for review so it sticks.