Take two or three hands-up answers, not open call-outs. Do not name the words mode or range yet — let pupils describe "the biggest bar" and "how spread out it is" in their own words first.

• Favourite fruit — point at the tallest bar; the mode is a category (the fruit), not a height.
• Pets — read smallest and largest, then say the one subtraction aloud: largest take smallest gives one number.
• Sports — two equal tallest bars; this is where you name two modes.
• Goals scored — one very tall bar makes the largest count much bigger than the smallest, so the range grows; ask what that does to the range before revealing.

Say verbatim: the mode is what happens most, the range is how spread out it is.

Talk this one through together — pupils take turns at the board and the class agrees or corrects out loud. Draw the answers out of the class rather than reading them off the board: the value 8 comes up twice, so 8 is the mode; the smallest total is 5 and the largest is 11, so the range is 11 − 5 = 6.

Watch for the mode-versus-range mix-up: the mode is a value that repeats, the range is largest take smallest. Hold out for pupils naming both parts before you accept the range. Revoice a strong answer: so eight is the mode because it turns up more than once, and the range is six because eleven take five is six.

This is the practice round — pupils take turns at the board, check each answer, and the class confirms before moving on. Keep the board work brisk rather than over-explaining.

The fourth set is the one that lands the big idea: one outlier stretches the range far wider than the other sets even though most of the data is unchanged. Ask the class to predict which set will have the biggest range before the last reveal.