Run sheet

Order of Operations — without Parentheses

Grade 6 · Lesson 3 · 23 slides · blocked practice

The big idea

Everyone must get the same answer from the same expression, so the order is agreed: exponents, then × and ÷ left to right, then + and − left to right.

Slide by slide

#	On the screen	What you say
1	Today — WARM-UP	Point at the five parts. Name where we are.
2	Evaluate 3³.	Boards up on three. This is yesterday's work — Exponents. Do not help each other; I need to see what each of you kept.
3	27 answer — own slide	Show me. Everyone at once. Check your own board against this.
4	Today — I DO	We are at I DO. Boards down and flat.
5	Everyone must get the same answer from the same expression, so the order is agreed: exponents, then × and ÷ left to right, then + and − left to right.	Read this out. Do not explain it yet — the example explains it.
6	8 + 2 × 5 build 1 of 5	Two days ago we met this.
7	8 + 2 × 5 50? 18? build 2 of 5	Left to right gives 50. Multiplication first gives 18. Both cannot stand.
8	8 + 2 × 5 50? 18? 8 + 10 build 3 of 5	The agreed order settles it: × before +.
9	8 + 2 × 5 50? 18? 8 + 10 8 + 2 × 5 = 18 build 4 of 5	So the value is 18.
10	8 + 2 × 5 50? 18? 8 + 10 8 + 2 × 5 = 18 2 + 3² × 4 → 2 + 9 × 4 → 38 build 5 of 5	With an exponent, that comes first of all.
11	Evaluate 6 + 4 × 3.	Now the same thing on a new one. Watch — nothing on your boards.
12	Multiplication first: 4 × 3 = 12. 6 + 12 18 answer — own slide	I say every step aloud as I write it. The board keeps all of it.
13	Today — WE DO	We are at WE DO. Boards up.
14	Evaluate 20 − 12 ÷ 4.	Which operation goes first? Say it before you write. Boards up.
15	Division first: 12 ÷ 4 = 3. 20 − 3 = 17 answer — own slide	Boards up. Everyone at once — check yours against this.
16	Evaluate 5 + 2² × 3.	Three operations. Take them in the agreed order.
17	Exponent: 2² = 4. 4 × 3 = 12. 5 + 12 = 17 answer — own slide	Boards up. Everyone at once — check yours against this.
18	Today — YOU DO	We are at YOU DO. Boards down, books open.
19	Dimensions 6A — page 5	Open your books to this page. Wait — do not start yet.
20	Do — page 5	These are the book's own problems, same type as the three we have just done. Work them in the book.
21	Today — CLOSURE	Last part. Answers up.
22	“Which operation does the order say goes first?”	This is the question to ask yourself every time, not just today.
23	Evaluate 10 − 2 × 3.	One last board. Then we are finished.

Mini whiteboards, by segment

Segment	MWB	Time	Boards	What to hold
WARM-UP	retrieval	3-5 min	BOARDS UP	Question up, boards up on the count. Everyone shows at once — a child who waits to see a neighbour's board has not retrieved anything.
I DO	none — they watch	3-4 min	boards down	Boards DOWN and flat. This segment is watching, and a child writing is not watching. Say so once at the start of the year and then hold it.
WE DO	primary use	5-6 min	BOARDS UP	One step, then boards up. Do not let them run ahead to the answer — the point is that everybody is on the same step at the same time.
YOU DO	on the sheet	4-5 min	boards down	Boards down. This is the book's problems, worked where the work will be kept.
CLOSURE	answers displayed	2-3 min	boards down	Answers on the board, children check their own. Mark nothing here.

Watch for
This lesson answers the trap set deliberately in Lesson 1. Go back to that board photo if you kept it — a class that remembers being wrong remembers the rule.