Run sheet

Place Value — Part 2

Grade 3 · Lesson 3 · 23 slides · blocked practice

The big idea

A number can be taken apart into its places and put back together, and it is the same number either way.

Slide by slide

#	On the screen	What you say
1	Today — WARM-UP	Point at the five parts. Name where we are.
2	What is the value of the 7 in 1,742?	Boards up on three. This is yesterday's work — Place Value — Part 1. Do not help each other; I need to see what each of you kept.
3	700 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	A number can be taken apart into its places and put back together, and it is the same number either way.	Read this out. Do not explain it yet — the example explains it.
6	2,406 build 1 of 5	2,406 written out.
7	2,406 2,000 build 2 of 5	Thousands.
8	2,406 2,000 2,000 + 400 build 3 of 5	Hundreds.
9	2,406 2,000 2,000 + 400 2,000 + 400 + 0 build 4 of 5	Tens — there are none, so nothing is added.
10	2,406 2,000 2,000 + 400 2,000 + 400 + 0 2,000 + 400 + 0 + 6 = 2,406 build 5 of 5	Ones. Put it back together and it is the same number.
11	Write 3,185 in expanded form.	Now the same thing on a new one. Watch — nothing on your boards.
12	3,000 + 100 + 80 + 5 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	Write 7,264 in expanded form.	One term for each place, largest first. Boards up.
15	7,000 + 200 + 60 + 4 answer — own slide	Boards up. Everyone at once — check yours against this.
16	Write 4,908 in expanded form.	One place here is empty. Decide what to do about it.
17	4,000 + 900 + 8 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 3A — page 14	Open your books to this page. Wait — do not start yet.
20	Do — page 14	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	“Have I accounted for every place?”	This is the question to ask yourself every time, not just today.
23	Write 6,030 in expanded form.	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. Grade 3 may drop this if the previous lesson was a review — from Grade 4 it is not optional.
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
4,908 forces the judgement about the empty tens: writing + 0 is not wrong and leaving it out is conventional. Accept either, but make the child SAY the tens place is empty — silence there is what causes 4,908 to be read as 498.