Run sheet

Hundreds, Tens, and Ones

Grade 2 · Lesson 5 · 23 slides · blocked practice

The big idea

Ten tens make one hundred, and a three-digit number is hundreds, tens and ones — the same idea one place further along.

Slide by slide

#	On the screen	What you say
1	Today — WARM-UP	Point at the five parts. Name where we are.
2	Which is greater, 47 or 74?	Boards up on three. This is yesterday's work — Comparing Tens and Ones. Do not help each other; I need to see what each of you kept.
3	74 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	Ten tens make one hundred, and a three-digit number is hundreds, tens and ones — the same idea one place further along.	Read this out. Do not explain it yet — the example explains it.
6	[10]×10 build 1 of 5	Ten bundles of ten.
7	[10]×10 [100] build 2 of 5	I band them together. That is one hundred.
8	[10]×10 [100] [100] [100] build 3 of 5	Two hundreds.
9	[10]×10 [100] [100] [100] [100] [100] [10] [10] [10] build 4 of 5	Add three tens.
10	[10]×10 [100] [100] [100] [100] [100] [10] [10] [10] 235 build 5 of 5	And five ones. Two hundreds, three tens, five ones.
11	How many hundreds, tens and ones in 416?	Now the same thing on a new one. Watch — nothing on your boards.
12	4 hundreds. 1 ten. 6 ones. 416 = 4 hundreds 1 ten 6 ones 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	How many hundreds, tens and ones in 528?	Name all three places, in order. Boards up.
15	5 hundreds 2 tens 8 ones answer — own slide	Boards up. Everyone at once — check yours against this.
16	How many hundreds, tens and ones in 307?	Say every place, even the empty one.
17	3 hundreds 0 tens 7 ones 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 2A — page 16	Open your books to this page. Wait — do not start yet.
20	Do — page 16	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 named every place, including the empty one?”	This is the question to ask yourself every time, not just today.
23	Write the number that is 6 hundreds, 0 tens and 2 ones.	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 2 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
307 repeats Grade 2 Lesson 1's zero problem one place along. A child who says 'three hundreds, seven ones' has skipped the tens and will write 37 when it matters.