It is very hot during the summer, so hot that your brain could stop working!
Show that your brain is working well right now by writing out the 21 times table.
How far can you get in five minutes?
1 x 21 = 21
2 x 21 = 42
. . .
CURRENT TEMPERATURE
21^{o}!
Try this activity again when you are feeling hot. Can you get as far in five minutes?
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Previous Day  This starter is for 17 August  Next Day
1 x 21 = 21
2 x 21 = 42
3 x 21 = 63
4 x 21 = 84
5 x 21 = 105
6 x 21 = 126
7 x 21 = 147
8 x 21 = 168
9 x 21 = 189
10 x 21 = 210
11 x 21 = 231
12 x 21 = 252
13 x 21 = 273
14 x 21 = 294
15 x 21 = 315
16 x 21 = 336
17 x 21 = 357
18 x 21 = 378
19 x 21 = 399
20 x 21 = 420
21 x 21 = 441
22 x 21 = 462
23 x 21 = 483
24 x 21 = 504
25 x 21 = 525
26 x 21 = 546
27 x 21 = 567
28 x 21 = 588
29 x 21 = 609
30 x 21 = 630
31 x 21 = 651
32 x 21 = 672
33 x 21 = 693
34 x 21 = 714
35 x 21 = 735
36 x 21 = 756
37 x 21 = 777
38 x 21 = 798
39 x 21 = 819
40 x 21 = 840
41 x 21 = 861
42 x 21 = 882
43 x 21 = 903
44 x 21 = 924
45 x 21 = 945
46 x 21 = 966
47 x 21 = 987
48 x 21 = 1008
49 x 21 = 1029
50 x 21 = 1050
Note to teacher: Doing this activity once with a class helps students develop strategies. It is only when they do this activity a second time that they will have the opportunity to practise those strategies. That is when the learning is consolidated. Click the button above to regenerate another version of this starter from random numbers.
Teacher, do your students have
access to computers? 

Here is the URL for a concise version of this page without comments or answers.
Transum.org/go/?Start=August17
Here is the URL which will take them to a game that will help them practise the 21 times table.
Here is the URL which will take them to more times tables activities.
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