1 00:00:00,000 --> 00:00:02,880 2 00:00:02,880 --> 00:00:04,830 YULIA ZHUKOVETS: All right, welcome back. 3 00:00:04,830 --> 00:00:07,020 I hope you are able to rest a little bit. 4 00:00:07,020 --> 00:00:10,050 We know it's been a long day, and lots of new things today 5 00:00:10,050 --> 00:00:11,700 that we learned and discussed. 6 00:00:11,700 --> 00:00:16,890 So this is our last session of the day, so let's jump right into it. 7 00:00:16,890 --> 00:00:20,220 So this is the session on microteaching. 8 00:00:20,220 --> 00:00:24,210 So as I think Carter already mentioned, or even David, 9 00:00:24,210 --> 00:00:27,030 this is a really good opportunity to practice 10 00:00:27,030 --> 00:00:33,900 teaching some of the CS or CS50-related topics to your peers, get some feedback, 11 00:00:33,900 --> 00:00:38,790 and then we'll do it over again tomorrow so you can incorporate that feedback 12 00:00:38,790 --> 00:00:40,420 and hopefully get a little bit better. 13 00:00:40,420 --> 00:00:43,830 So some goals of today is to practice teaching. 14 00:00:43,830 --> 00:00:49,560 So you can do any CS or CS50 related topic of choice. 15 00:00:49,560 --> 00:00:53,940 Your peers will then give you feedback, some pieces of advice 16 00:00:53,940 --> 00:00:57,780 that you can hopefully-- will be able to incorporate tomorrow. 17 00:00:57,780 --> 00:01:02,110 And then you can use that feedback to improve your teaching. 18 00:01:02,110 --> 00:01:07,607 So before we do that and jump into our breakout rooms again, 19 00:01:07,607 --> 00:01:09,940 we're just going to go through a couple of instructions. 20 00:01:09,940 --> 00:01:11,647 And I'm going to hand it over to Carter. 21 00:01:11,647 --> 00:01:12,730 CARTER ZENKE: OK, friends. 22 00:01:12,730 --> 00:01:14,313 So we have some more instructions now. 23 00:01:14,313 --> 00:01:15,340 Are you ready for these? 24 00:01:15,340 --> 00:01:16,100 Yes? 25 00:01:16,100 --> 00:01:16,600 Yeah. 26 00:01:16,600 --> 00:01:17,380 OK, good. 27 00:01:17,380 --> 00:01:19,868 So what we're going to do is as follows. 28 00:01:19,868 --> 00:01:21,910 You remember your number, yes, your group number? 29 00:01:21,910 --> 00:01:22,510 AUDIENCE: Yes. 30 00:01:22,510 --> 00:01:23,950 CARTER ZENKE: Yes, OK. 31 00:01:23,950 --> 00:01:25,930 Keep that number in your mind. 32 00:01:25,930 --> 00:01:27,430 Don't forget it. 33 00:01:27,430 --> 00:01:30,760 And we're going to leave in the same algorithm we used before. 34 00:01:30,760 --> 00:01:35,260 When we go to our rooms, we're not going to go to the posters. 35 00:01:35,260 --> 00:01:37,390 Posters are done. 36 00:01:37,390 --> 00:01:39,100 Posters no more. 37 00:01:39,100 --> 00:01:40,750 You're going to find a table. 38 00:01:40,750 --> 00:01:43,360 That table will have your group number. 39 00:01:43,360 --> 00:01:44,830 Think of your number. 40 00:01:44,830 --> 00:01:46,480 My number is 10. 41 00:01:46,480 --> 00:01:48,610 I look for a table that has what number? 42 00:01:48,610 --> 00:01:49,210 AUDIENCE: 10. 43 00:01:49,210 --> 00:01:49,918 CARTER ZENKE: 10. 44 00:01:49,918 --> 00:01:50,530 Good. 45 00:01:50,530 --> 00:01:54,490 Next, you're going to sit in your table with your group. 46 00:01:54,490 --> 00:01:58,510 There will be five or six of you, five or six. 47 00:01:58,510 --> 00:02:03,760 Of those five or six, I want you to choose a teacher who will teach first. 48 00:02:03,760 --> 00:02:06,670 Very scary, yeah? 49 00:02:06,670 --> 00:02:07,930 But someone has to do it. 50 00:02:07,930 --> 00:02:09,139 Someone has to teach first. 51 00:02:09,139 --> 00:02:11,740 So choose one person to teach first. 52 00:02:11,740 --> 00:02:13,090 It can be anyone. 53 00:02:13,090 --> 00:02:16,330 Next, that teacher will teach. 54 00:02:16,330 --> 00:02:19,030 55 00:02:19,030 --> 00:02:22,960 That teacher will teach a topic of their choice in CS50's curriculum 56 00:02:22,960 --> 00:02:26,020 and they will teach for five minutes. 57 00:02:26,020 --> 00:02:26,890 Hold up five for me. 58 00:02:26,890 --> 00:02:29,080 Five minutes. 59 00:02:29,080 --> 00:02:31,240 There will be someone in the room with you, 60 00:02:31,240 --> 00:02:36,910 either me, Yulia, or Margaret, who will tell you when five minutes are done. 61 00:02:36,910 --> 00:02:38,560 So you wait and you listen to them. 62 00:02:38,560 --> 00:02:40,420 If they say time is up, time is up. 63 00:02:40,420 --> 00:02:41,530 No more teaching. 64 00:02:41,530 --> 00:02:42,670 Stop teaching. 65 00:02:42,670 --> 00:02:44,740 No more. 66 00:02:44,740 --> 00:02:49,330 After that, you will repeat, in this case, steps three and four. 67 00:02:49,330 --> 00:02:51,070 So if you just taught, you're done. 68 00:02:51,070 --> 00:02:53,530 Congratulations, you finished. 69 00:02:53,530 --> 00:02:56,770 But now someone new has to teach. 70 00:02:56,770 --> 00:02:59,170 And they will teach-- and they will teach for how long? 71 00:02:59,170 --> 00:03:00,128 AUDIENCE: Five minutes. 72 00:03:00,128 --> 00:03:02,110 CARTER ZENKE: Five minutes. 73 00:03:02,110 --> 00:03:04,525 Then once they finish, what next? 74 00:03:04,525 --> 00:03:05,830 AUDIENCE: [INAUDIBLE]. 75 00:03:05,830 --> 00:03:08,320 CARTER ZENKE: Next person teaches, yes. 76 00:03:08,320 --> 00:03:12,340 And we keep going until everyone has taught, whether five or six people, 77 00:03:12,340 --> 00:03:14,620 in your group. 78 00:03:14,620 --> 00:03:17,890 So we're going to demo this with me and Yulia. 79 00:03:17,890 --> 00:03:20,582 Yulia has kindly volunteered to be the first teacher in my group 80 00:03:20,582 --> 00:03:22,540 which I'm so excited about because it's not me. 81 00:03:22,540 --> 00:03:25,420 82 00:03:25,420 --> 00:03:27,990 So Yulia, would you kindly share your lesson with me? 83 00:03:27,990 --> 00:03:28,865 YULIA ZHUKOVETS: Yes. 84 00:03:28,865 --> 00:03:31,330 So I know this might not be visible to everyone, 85 00:03:31,330 --> 00:03:33,470 but this is kind of like the gist of it. 86 00:03:33,470 --> 00:03:37,210 So you'll find a similar whiteboard, a marker, and an eraser 87 00:03:37,210 --> 00:03:39,020 on each of the tables. 88 00:03:39,020 --> 00:03:40,480 So you can choose to use them. 89 00:03:40,480 --> 00:03:43,130 Maybe you can use it-- you want to use a piece of paper that you have, 90 00:03:43,130 --> 00:03:44,047 it's really up to you. 91 00:03:44,047 --> 00:03:48,040 But we find whiteboards to be really helpful to visualize. 92 00:03:48,040 --> 00:03:53,320 So for example once I came up to my table, I found my group, 93 00:03:53,320 --> 00:03:57,010 and I'm the first teacher to teach, I picked the topic 94 00:03:57,010 --> 00:04:03,670 to be how to declare a variable in C. You 95 00:04:03,670 --> 00:04:05,260 need to pick something very specific. 96 00:04:05,260 --> 00:04:06,385 You only have five minutes. 97 00:04:06,385 --> 00:04:10,170 You can't explain how to do a merge sort algorithm. 98 00:04:10,170 --> 00:04:13,600 We'll be there for a while. 99 00:04:13,600 --> 00:04:14,670 So Carter, are you ready? 100 00:04:14,670 --> 00:04:15,670 CARTER ZENKE: I'm ready. 101 00:04:15,670 --> 00:04:16,750 YULIA ZHUKOVETS: Are you ready to be a student? 102 00:04:16,750 --> 00:04:18,417 CARTER ZENKE: I'm ready to be a student. 103 00:04:18,417 --> 00:04:19,420 YULIA ZHUKOVETS: OK. 104 00:04:19,420 --> 00:04:23,710 So remember in the lecture, we had an example with the phone book. 105 00:04:23,710 --> 00:04:25,210 CARTER ZENKE: I don't remember that. 106 00:04:25,210 --> 00:04:27,370 YULIA ZHUKOVETS: OK, that's fine. 107 00:04:27,370 --> 00:04:28,540 Do you have a phone? 108 00:04:28,540 --> 00:04:29,200 CARTER ZENKE: I have a phone. 109 00:04:29,200 --> 00:04:31,960 YULIA ZHUKOVETS: OK, so for example, you know how in your phone, 110 00:04:31,960 --> 00:04:36,460 you have some maybe people that you call, 111 00:04:36,460 --> 00:04:39,370 and then maybe you want to count how many times you called me. 112 00:04:39,370 --> 00:04:40,180 CARTER ZENKE: Yes. 113 00:04:40,180 --> 00:04:42,502 YULIA ZHUKOVETS: So for example, that number is five. 114 00:04:42,502 --> 00:04:43,210 CARTER ZENKE: OK. 115 00:04:43,210 --> 00:04:44,168 YULIA ZHUKOVETS: Right. 116 00:04:44,168 --> 00:04:46,492 But what if I wanted to write a program. 117 00:04:46,492 --> 00:04:48,700 You're doing something, for example, like calculating 118 00:04:48,700 --> 00:04:53,740 how many times you called each of your friends, or your family members. 119 00:04:53,740 --> 00:04:57,340 I need to do something with this number, or store it 120 00:04:57,340 --> 00:05:00,378 somewhere so that I can then use it. 121 00:05:00,378 --> 00:05:02,170 Do you happen to remember how I can do that 122 00:05:02,170 --> 00:05:05,780 from lecture, how I can store things. 123 00:05:05,780 --> 00:05:08,668 124 00:05:08,668 --> 00:05:09,710 CARTER ZENKE: A variable? 125 00:05:09,710 --> 00:05:11,180 YULIA ZHUKOVETS: Yes, a variable. 126 00:05:11,180 --> 00:05:12,010 Great. 127 00:05:12,010 --> 00:05:14,390 [LAUGHING] 128 00:05:14,390 --> 00:05:14,890 129 00:05:14,890 --> 00:05:16,295 Carter is a good student. 130 00:05:16,295 --> 00:05:18,632 [LAUGHING] 131 00:05:18,632 --> 00:05:19,080 132 00:05:19,080 --> 00:05:19,580 OK. 133 00:05:19,580 --> 00:05:22,760 So how can we declare that variable? 134 00:05:22,760 --> 00:05:26,553 Do you remember maybe three key steps from the lecture? 135 00:05:26,553 --> 00:05:28,220 CARTER ZENKE: I think you needed a name. 136 00:05:28,220 --> 00:05:30,140 YULIA ZHUKOVETS: OK, a name. 137 00:05:30,140 --> 00:05:33,530 CARTER ZENKE: And, well, maybe the number. 138 00:05:33,530 --> 00:05:35,960 YULIA ZHUKOVETS: OK, so maybe we call it a value. 139 00:05:35,960 --> 00:05:38,450 CARTER ZENKE: OK, a value. 140 00:05:38,450 --> 00:05:39,485 Is that it? 141 00:05:39,485 --> 00:05:40,610 Oh, you said three things. 142 00:05:40,610 --> 00:05:41,943 YULIA ZHUKOVETS: One more thing. 143 00:05:41,943 --> 00:05:43,910 144 00:05:43,910 --> 00:05:45,170 Can anyone help me? 145 00:05:45,170 --> 00:05:45,470 AUDIENCE: The type. 146 00:05:45,470 --> 00:05:46,310 CARTER ZENKE: Oh, the type. 147 00:05:46,310 --> 00:05:47,480 YULIA ZHUKOVETS: Type, OK. 148 00:05:47,480 --> 00:05:49,340 So I need a type. 149 00:05:49,340 --> 00:05:53,210 So every time you want to declare a new variable, 150 00:05:53,210 --> 00:05:57,780 we want to have these three things, a type, a name, and a value. 151 00:05:57,780 --> 00:06:00,632 So for example, what name do you want to pick for this value? 152 00:06:00,632 --> 00:06:02,840 CARTER ZENKE: It's number of times I called somebody? 153 00:06:02,840 --> 00:06:03,260 YULIA ZHUKOVETS: Yeah. 154 00:06:03,260 --> 00:06:04,010 CARTER ZENKE: Maybe calls. 155 00:06:04,010 --> 00:06:05,270 YULIA ZHUKOVETS: Calls, OK. 156 00:06:05,270 --> 00:06:06,840 And then what is my value? 157 00:06:06,840 --> 00:06:07,340 This is it. 158 00:06:07,340 --> 00:06:08,132 CARTER ZENKE: Five. 159 00:06:08,132 --> 00:06:09,260 YULIA ZHUKOVETS: OK, five. 160 00:06:09,260 --> 00:06:10,490 CARTER ZENKE: I see five. 161 00:06:10,490 --> 00:06:12,860 YULIA ZHUKOVETS: And then looking at number-- 162 00:06:12,860 --> 00:06:15,892 looking at five, what kind of type do you think it is? 163 00:06:15,892 --> 00:06:16,850 CARTER ZENKE: A number. 164 00:06:16,850 --> 00:06:18,930 [LAUGHING] 165 00:06:18,930 --> 00:06:19,430 166 00:06:19,430 --> 00:06:22,100 YULIA ZHUKOVETS: OK, I call it a number. 167 00:06:22,100 --> 00:06:23,408 Can I do that? 168 00:06:23,408 --> 00:06:24,230 AUDIENCE: Yeah. 169 00:06:24,230 --> 00:06:26,135 YULIA ZHUKOVETS: Can I say num calls five? 170 00:06:26,135 --> 00:06:26,677 AUDIENCE: No. 171 00:06:26,677 --> 00:06:28,940 YULIA ZHUKOVETS: No. 172 00:06:28,940 --> 00:06:30,740 I need to give it a data type, right? 173 00:06:30,740 --> 00:06:32,390 And we have different ones. 174 00:06:32,390 --> 00:06:36,120 We have int, and floats, and maybe a string. 175 00:06:36,120 --> 00:06:38,662 So between those, which one do you think we need to use here. 176 00:06:38,662 --> 00:06:40,412 CARTER ZENKE: I think it's a whole number. 177 00:06:40,412 --> 00:06:41,508 So what should I use? 178 00:06:41,508 --> 00:06:42,050 AUDIENCE: Int 179 00:06:42,050 --> 00:06:42,830 CARTER ZENKE: Int. 180 00:06:42,830 --> 00:06:44,850 YULIA ZHUKOVETS: Integer, great. 181 00:06:44,850 --> 00:06:48,630 So I have int calls and I'm missing just one last step. 182 00:06:48,630 --> 00:06:51,420 This is still disjointed. 183 00:06:51,420 --> 00:06:52,960 How can I connect these things? 184 00:06:52,960 --> 00:06:54,930 CARTER ZENKE: The assignment operator. 185 00:06:54,930 --> 00:06:57,210 YULIA ZHUKOVETS: Yes, I can use my equal sign. 186 00:06:57,210 --> 00:07:02,760 So by using these three things, type, name, and value, 187 00:07:02,760 --> 00:07:07,770 I can create a new variable called calls that is of type int 188 00:07:07,770 --> 00:07:09,480 and a string value five. 189 00:07:09,480 --> 00:07:13,770 And after that, I can do a very similar thing for the rest of the calls 190 00:07:13,770 --> 00:07:15,870 that you're making to your friends. 191 00:07:15,870 --> 00:07:20,538 What questions do we have about a process of declaring a new variable? 192 00:07:20,538 --> 00:07:22,080 CARTER ZENKE: That makes sense to me. 193 00:07:22,080 --> 00:07:23,370 YULIA ZHUKOVETS: Awesome. 194 00:07:23,370 --> 00:07:25,287 CARTER ZENKE: Give you your round of applause. 195 00:07:25,287 --> 00:07:26,540 [APPLAUSE] 196 00:07:26,540 --> 00:07:29,532 197 00:07:29,532 --> 00:07:30,240 CARTER ZENKE: OK. 198 00:07:30,240 --> 00:07:32,520 So Yulia very bravely was the first person 199 00:07:32,520 --> 00:07:35,880 to teach in my group, so thank you very much. 200 00:07:35,880 --> 00:07:39,060 Now it's important that we don't just teach, 201 00:07:39,060 --> 00:07:41,700 but we get feedback on our teaching because how can we 202 00:07:41,700 --> 00:07:44,580 improve without feedback? 203 00:07:44,580 --> 00:07:45,870 So this is the first step. 204 00:07:45,870 --> 00:07:50,730 But after the person teaches, we then need to give them some feedback. 205 00:07:50,730 --> 00:07:53,760 And here is how you will give feedback in your groups. 206 00:07:53,760 --> 00:07:56,250 After your teacher has finished their five-minute lesson, 207 00:07:56,250 --> 00:08:01,320 listen to another timer that either me, Yulia, or Margaret will set. 208 00:08:01,320 --> 00:08:03,270 Two minutes. 209 00:08:03,270 --> 00:08:06,360 On your table will be a piece of paper. 210 00:08:06,360 --> 00:08:10,680 That paper says write three pieces of feedback for the teacher, 211 00:08:10,680 --> 00:08:13,240 in this case, Yulia, OK. 212 00:08:13,240 --> 00:08:17,742 Each person in your group should write feedback for the first person who taught 213 00:08:17,742 --> 00:08:19,450 and the next person, and the next person. 214 00:08:19,450 --> 00:08:23,060 Each person should get feedback from everyone. 215 00:08:23,060 --> 00:08:27,380 Now make sure you include things that are both positive 216 00:08:27,380 --> 00:08:30,020 and things they could improve. 217 00:08:30,020 --> 00:08:34,159 Yulia, I really liked how you asked for my questions, 218 00:08:34,159 --> 00:08:37,640 how you asked me to actually fill things in for you. 219 00:08:37,640 --> 00:08:39,830 It was very interactive. 220 00:08:39,830 --> 00:08:45,247 An improvement to make is I think you still need a semicolon at the end, which 221 00:08:45,247 --> 00:08:45,830 we all forget. 222 00:08:45,830 --> 00:08:47,455 YULIA ZHUKOVETS: Which one is that way? 223 00:08:47,455 --> 00:08:49,130 [LAUGHING] 224 00:08:49,130 --> 00:08:51,170 CARTER ZENKE: So it can be things like that, OK? 225 00:08:51,170 --> 00:08:55,370 Things that they did well and things that they could improve. 226 00:08:55,370 --> 00:08:58,820 And once you have your feedback, make sure you give the paper to the teacher 227 00:08:58,820 --> 00:09:02,180 and that teacher will keep it until tomorrow, 228 00:09:02,180 --> 00:09:07,210 and they'll improve their lesson based on the feedback. 229 00:09:07,210 --> 00:09:12,250 So if you are the teacher, you will get feedback, you will read it, 230 00:09:12,250 --> 00:09:14,530 and you will say, what did I do well? 231 00:09:14,530 --> 00:09:16,630 What should I do tomorrow? 232 00:09:16,630 --> 00:09:20,620 You will also see what should I improve, what should I change tomorrow? 233 00:09:20,620 --> 00:09:24,350 234 00:09:24,350 --> 00:09:27,292 We have those instructions in Bahasa, too, if that's helpful. 235 00:09:27,292 --> 00:09:29,000 YULIA ZHUKOVETS: And all the instructions 236 00:09:29,000 --> 00:09:33,780 for the teaching part and the feedback part will also be on your tables. 237 00:09:33,780 --> 00:09:38,260 So if you don't remember something, you can easily reference it, OK? 238 00:09:38,260 --> 00:09:39,260 CARTER ZENKE: All right. 239 00:09:39,260 --> 00:09:40,280 Are you all ready? 240 00:09:40,280 --> 00:09:41,180 AUDIENCE: Yes. 241 00:09:41,180 --> 00:09:42,305 CARTER ZENKE: Are you sure? 242 00:09:42,305 --> 00:09:44,740 AUDIENCE: Yes. 243 00:09:44,740 --> 00:09:46,700 CARTER ZENKE: Are you really sure? 244 00:09:46,700 --> 00:09:47,200 OK. 245 00:09:47,200 --> 00:09:48,075 I think you're ready. 246 00:09:48,075 --> 00:09:48,820 So we're-- oh. 247 00:09:48,820 --> 00:09:49,270 YULIA ZHUKOVETS: Yeah. 248 00:09:49,270 --> 00:09:50,080 CARTER ZENKE: We got one more, sorry. 249 00:09:50,080 --> 00:09:50,813 I'm not ready. 250 00:09:50,813 --> 00:09:51,730 YULIA ZHUKOVETS: Yeah. 251 00:09:51,730 --> 00:09:56,290 So for example, I picked a very specific thing, how to declare a variable in C. 252 00:09:56,290 --> 00:09:58,930 It's really short in time and you can really 253 00:09:58,930 --> 00:10:01,870 practice asking questions and visualizing things. 254 00:10:01,870 --> 00:10:04,660 But if you need some suggestions, here are some things 255 00:10:04,660 --> 00:10:06,730 that you might want to consider teaching. 256 00:10:06,730 --> 00:10:10,780 For example, a quick tutorial on arrays, for loops, 257 00:10:10,780 --> 00:10:14,290 maybe difference between for and while loops, strings, or really anything else 258 00:10:14,290 --> 00:10:15,580 from the CS50 course. 259 00:10:15,580 --> 00:10:18,910 If you really want to cram the merge sort algorithm in five minutes, 260 00:10:18,910 --> 00:10:19,780 go for it. 261 00:10:19,780 --> 00:10:22,180 You got it, totally. 262 00:10:22,180 --> 00:10:25,990 But if you aren't sure what to do, here are some things to consider. 263 00:10:25,990 --> 00:10:29,680 And without further ado, we'll do the same algorithm 264 00:10:29,680 --> 00:10:32,350 and we did in the previous session. 265 00:10:32,350 --> 00:10:33,339 So Carter? 266 00:10:33,339 --> 00:10:35,672 CARTER ZENKE: Do y'all remember the algorithm last time? 267 00:10:35,672 --> 00:10:36,297 AUDIENCE: Yeah. 268 00:10:36,297 --> 00:10:37,517 CARTER ZENKE: Yeah, OK. 269 00:10:37,517 --> 00:10:38,350 So here it is again. 270 00:10:38,350 --> 00:10:40,810 If you are groups one through 10, raise your hand. 271 00:10:40,810 --> 00:10:42,580 One through 10, raise your hand. 272 00:10:42,580 --> 00:10:44,960 OK, please stand up. 273 00:10:44,960 --> 00:10:48,230 Groups one through 10, stand up and get ready. 274 00:10:48,230 --> 00:10:53,420 And do you see Margaret over here, Margaret on the left, yes? 275 00:10:53,420 --> 00:10:56,090 Go follow Margaret. 276 00:10:56,090 --> 00:10:57,890 OK, welcome back. 277 00:10:57,890 --> 00:10:59,210 How did it feel. 278 00:10:59,210 --> 00:10:59,780 [CHEERING] 279 00:10:59,780 --> 00:11:00,530 Yeah? 280 00:11:00,530 --> 00:11:01,370 OK. 281 00:11:01,370 --> 00:11:02,060 Awesome. 282 00:11:02,060 --> 00:11:04,160 I'm hearing happy, wonderful. 283 00:11:04,160 --> 00:11:05,090 I'm so glad. 284 00:11:05,090 --> 00:11:10,460 So keep in mind the feedback you got today, because remember, tomorrow, we'll 285 00:11:10,460 --> 00:11:14,150 come back and do the same thing again. 286 00:11:14,150 --> 00:11:17,900 So two things to remember for tomorrow. 287 00:11:17,900 --> 00:11:25,910 One is your feedback and two, just as important, is your group number. 288 00:11:25,910 --> 00:11:27,320 AUDIENCE: [INAUDIBLE]. 289 00:11:27,320 --> 00:11:30,830 YULIA ZHUKOVETS: The number that you had, put it right in your mind 290 00:11:30,830 --> 00:11:33,170 and keep it there until tomorrow. 291 00:11:33,170 --> 00:11:35,660 Do not lose it. 292 00:11:35,660 --> 00:11:37,310 Can you promise me this? 293 00:11:37,310 --> 00:11:38,450 Promise me. 294 00:11:38,450 --> 00:11:40,520 OK, keep that number. 295 00:11:40,520 --> 00:11:42,930 Do not lose it. 296 00:11:42,930 --> 00:11:46,360 All right, that is it for microteaching.