Run sheet

Tens and Ones

Grade 2 · Lesson 1 · 22 slides · blocked practice

The big idea

A two-digit number is made of tens and ones, and the place a digit sits in tells you which it is.

Slide by slide

#	On the screen	What you say
1	Today — WARM-UP	Point at the five parts. Name where we are.
2	Tens and Ones	First lesson of the year, so there is nothing behind us yet. We start at the idea.
3	Today — I DO	We are at I DO. Boards down and flat.
4	A two-digit number is made of tens and ones, and the place a digit sits in tells you which it is.	Read this out. Do not explain it yet — the example explains it.
5	23 loose counters build 1 of 5	Twenty-three counters, loose. Counting them one at a time is slow.
6	23 loose counters [10] + 13 loose build 2 of 5	I bundle ten.
7	23 loose counters [10] + 13 loose [10] [10] + 3 loose build 3 of 5	I bundle ten more.
8	23 loose counters [10] + 13 loose [10] [10] + 3 loose 2 tens 3 ones build 4 of 5	Two bundles and three left over.
9	23 loose counters [10] + 13 loose [10] [10] + 3 loose 2 tens 3 ones 23 = 2 tens 3 ones build 5 of 5	I write it as a number. The 2 means two TENS.
10	How many tens and ones in 47?	Now the same thing on a new one. Watch — nothing on your boards.
11	The 4 is in the tens place: 4 tens. The 7 is in the ones place: 7 ones. 47 = 4 tens 7 ones answer — own slide	I say every step aloud as I write it. The board keeps all of it.
12	Today — WE DO	We are at WE DO. Boards up.
13	How many tens and ones in 62?	Tens first. Boards up.
14	6 tens 2 ones answer — own slide	Boards up. Everyone at once — check yours against this.
15	How many tens and ones in 30?	Watch the ones place carefully on this one.
16	3 tens 0 ones answer — own slide	Boards up. Everyone at once — check yours against this.
17	Today — YOU DO	We are at YOU DO. Boards down, books open.
18	Dimensions 2A — page 5	Open your books to this page. Wait — do not start yet.
19	Do — page 5	These are the book's own problems, same type as the three we have just done. Work them in the book.
20	Today — CLOSURE	Last part. Answers up.
21	“Which place is this digit sitting in?”	This is the question to ask yourself every time, not just today.
22	Write the number that is 5 tens and 1 one.	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
30 is chosen for the zero. Children say '3 tens' and stop, because 0 ones feels like nothing to say. It must be said — it is what makes 30 different from 3.