Post AnjiQyafgFDUjIIlcX by tobyjaffey@mastodon.me.uk
(DIR) More posts by tobyjaffey@mastodon.me.uk
(DIR) Post #AnjT3xWly2dXSb2piC by futurebird@sauropods.win
2024-11-05T12:23:19Z
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I need your help and creativity.You know how scratch off lottery tickets work? Did you know you can buy stickers that can turn anything into a “scratch off”? Well ever since I’ve discovered these stickers I’ve been desperate to find a way to use them in teaching grade school level CS. The idea of hidden keys, broken seals— I know there’s an angle here.Am I just attracted to stickers? Yes. I have a few ideas but they aren’t good enough. I turn to the fedi to enable this sticker stuff.
(DIR) Post #AnjTIpgDQY1hSsYOR6 by pikesley@mastodon.me.uk
2024-11-05T12:25:55Z
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@futurebird I think you should hide this QR Code under the scratch-off
(DIR) Post #AnjTbS0Jg3n9XOpjyy by futurebird@sauropods.win
2024-11-05T12:29:22Z
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@pikesley oh god not more spam. where does it go? I’ve been banning people all morning.
(DIR) Post #AnjTjMJ2kJvABNMcCW by SKleefeld@mastodon.social
2024-11-05T12:30:47Z
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@futurebird For big paper/tests, you could use the stickers to cover their grades so that they have to scratch off the sticker to see them. It would offer a degree of privacy for students while you're returning papers back in class for any kids who might be embarrassed by their grade.
(DIR) Post #AnjU6X0d7Q242OnhVQ by Kiki@chaos.social
2024-11-05T12:34:58Z
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@futurebird Public keys. The scratching coin is the private key.
(DIR) Post #AnjVeOFgHgIYg4Y8Yq by Wharrrrrrgarbl@an.errant.cloud
2024-11-05T12:52:17Z
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@futurebird you could do instant feedback: write your answer and then scratch off to see if you're right. It first occurred to me in the context of giving them a corrupted block of message in an error correcting code and fixing it, but I guess you can cover up really any answer...I now have a vague idea about scratching off to create the answer that I haven't yet thought through in a usable way.
(DIR) Post #AnjWbyFk4pG1PyzLVo by llewelly@sauropods.win
2024-11-05T13:03:05Z
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@futurebird obviously the grid address is a memory address, and when you dereference the pointer, you scratch off the stuff to see what you retrieved from the memory address ... a 1980s lesson ... maybe don't teach them that. : )
(DIR) Post #AnjWg9cjk4XnqIjroO by Vordus@chitter.xyz
2024-11-05T13:03:49Z
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@futurebird *checks* it's a YouTube link. You can probably guess the rest.
(DIR) Post #AnjYIKRq2vIIN6PMcy by megueyb@dice.camp
2024-11-05T13:21:55Z
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@futurebird oh hello! This is a game design project and I’m a game designer! I also know a ton of fellow designers who are in education, even grad school education!
(DIR) Post #AnjZgzYgwwJomHwClk by williampietri@sfba.social
2024-11-05T13:37:34Z
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@futurebird One thing they might make a good metaphor for is I/O cost.If I have a file of records and I want to find something in it, I could read each one, which would be demonstrated by scratching them off sequentially. But if I know the file is, say, in alphabetical order, I can do something faster by being strategic in which ones I scratch off, like a binary search.(And if you need more metaphor, once you've read a block it's in RAM, so it's basically free to look at it again.)
(DIR) Post #AnjbFTzoOGPaygdKYC by wtrmt@mastodon.social
2024-11-05T13:55:01Z
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@futurebird it can be as simple as using them to hide a hand drawn star or a word of recognition besides a great exam result or the grade on a homework. After all these years, I still remember those messages of encouragement fondly
(DIR) Post #Anjf2oqlwXtjhxcdhQ by PizzaDemon@mastodon.online
2024-11-05T14:37:30Z
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@futurebird variable scoping.
(DIR) Post #AnjhOLTM37TUsF3qPA by Canageek@wandering.shop
2024-11-05T14:59:14Z
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@futurebird depending on the age group you could use them to hide variables under them, and then have them run through a program uncovering values as they go as an introduction to how variables and flow control works.
(DIR) Post #AnjhYF6uYeLm2RHafQ by tobyjaffey@mastodon.me.uk
2024-11-05T15:05:38Z
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@futurebird Measuring the time complexity (number of scratches) needed to find an item in a sorted list. Eg. comparing binary search to linear search.
(DIR) Post #AnjiQyafgFDUjIIlcX by tobyjaffey@mastodon.me.uk
2024-11-05T15:15:31Z
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@futurebird Generate a minesweeper board, then place stickers over each cell.Student has to deduce mine locations.Examplehttps://stackoverflow.com/a/8305826/283981https://www.chiark.greenend.org.uk/~sgtatham/puzzles/js/mines.html
(DIR) Post #AnjjIsxapVJGuAjGKm by futurebird@sauropods.win
2024-11-05T15:25:17Z
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@tobyjaffey This is PERFECT!
(DIR) Post #AnjjN1ByAKv7atQMHg by futurebird@sauropods.win
2024-11-05T15:26:03Z
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@tobyjaffey Excellent idea!
(DIR) Post #AnjjkJi9Tif9graRvM by futurebird@sauropods.win
2024-11-05T15:30:15Z
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@wtrmt I like some of the cool puzzle ideas in this thread but this is a good reminder of why I’m obsessed with stickers in the first place— they are just fun and a little special.
(DIR) Post #AnjjmAYYUEJjsOyuQq by TerryHancock@realsocial.life
2024-11-05T15:30:27Z
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@futurebird Did not know this! Very cool. :amaze:
(DIR) Post #AnjkkraRd4jmhxo3JQ by mbrailer@mstdn.social
2024-11-05T15:41:33Z
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@futurebird Back in the day of text adventure games, publisher Infocom used to sell books with invisible clues that you had to reveal with a provided marker pen. Every hint had multiple levels of detail, starting from a vague clue to the full answer.You could use these stickers to produce the same effect. Cover hints with the stickers, and students can scratch off the first one to get a hint, and another if they need more.If there are stickers that aren't round, that would be better.
(DIR) Post #Anjl57UsBYZdqOrL0K by stepheneb@ruby.social
2024-11-05T15:45:11Z
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@futurebird they might be great for doing the monte-hall 3-door probability puzzle! It’s such a great puzzle that is so easy to get wrong. A card printed with 3 circles, one with a prize. This is printed on both sides. On one side scratch-off stickers cover the circles. Pair of students, one playing Monte character. Student picks a circle. “Monte” looks at the back and scratches off 1 of other 2 that doesn’t have prize and asks student if they want to change pick.
(DIR) Post #AnjlaYUDtB7EWmXq52 by drmel@mastodon.social
2024-11-05T15:50:51Z
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@futurebird have you ever seen the scratch off alternative to scantron forms called IFAT? https://www.cognalearn.com/ifat They are brilliant in design, goving students a way to get inmediate feedback about whether their first choice is correct, and thebopportunity to keep scratching until they find the correct answer. Genius way to improve immediate feedback for students on everything from quick quizzes to final exams that use any multiple choice.
(DIR) Post #Anjn7lKPGTirrkLqoy by knowuh@mastodon.social
2024-11-05T16:08:03Z
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@futurebird what about a binary search experiment?Students know that under each dot there is a number. Numbers are in order.Students are ask to find a specific number. They do not know if the number is on the paper.They do not know the minimum or maximum value of the numbers. How few items can they scratch off to find the number or find the missing number? What strategy did they use?You could explore the problem with different number distributions.
(DIR) Post #AnjntxdWo0R3wKHJSq by catselbow@fosstodon.org
2024-11-05T16:16:47Z
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@futurebird It would take a lot of stickers, but how about the "100 prisoners problem"?https://en.wikipedia.org/wiki/100_prisoners_problem(This is also a fun programming problem. You can generate random scenarios and show how the paths divide into a small number of closed cycles.)Or, with fewer stickers, the Monty Hall problem:https://en.wikipedia.org/wiki/Monty_Hall_problem
(DIR) Post #AnjpjDr8MTfUxyeKZM by Bromind@framapiaf.org
2024-11-05T16:37:14Z
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@futurebird I don't know if the ones you have are large enough, but this immediately makes me thinks of providing hints in an exam. I've been searching for a way to let students « buy » hints (e.g. if you are blocked at question N, reveal this hint and you can still try to get half marks) for quite some time, and it seems this could be an efficient way to implement such hints.
(DIR) Post #Anjuhm6UYefGNKxiPw by gnate@ohai.social
2024-11-05T17:34:01Z
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@futurebird Something with Boolean functions? Revealing the "right" path through evaluating functions, etc.
(DIR) Post #AnjwNPytIcnjscpNiq by shertson@mastodon.world
2024-11-05T17:51:45Z
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@futurebird OMG... I need these! So many possibilities 🤪
(DIR) Post #AnjyZdWYyKbhGaX1AO by moira@mastodon.murkworks.net
2024-11-05T18:16:23Z
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@futurebird There was a classic era game show that involved slowly showing a picture that in and of itself was a puzzle - _Concentration_ maybe - and the goal was to come up with the answer to the puzzle. Might be too many steps but maybe something like that?
(DIR) Post #Ank0ccQlh4yEeVN3gG by derek@www.glidden.life
2024-11-05T18:39:19Z
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@futurebird a very basic (no pun intended) "choose your own adventure" with programming statements? label each sticker and under the scrach-off is the next "programming" instruction to go to the appropriate sticker? I dunno, that's just a top-of-the-head and probably painfully inefficient idea.
(DIR) Post #Ank1yxNMbKE9wAzfqC by Tarrenvane@dragonscave.space
2024-11-05T18:54:33Z
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@futurebird What does CS stand for in this case? (Is grade-school computer science a thing?)
(DIR) Post #AnkB6fM0OBUvwo6qDQ by GregStolze@mastodon.social
2024-11-05T20:36:47Z
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@futurebird @wtrmt Wasn't there something about Columbia House Records putting a scratch-off bit on their ads...?
(DIR) Post #AnkYFI3gfUb1FYcf6O by lufthans@mastodon.social
2024-11-06T00:56:05Z
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@futurebird do you cover state machines?Students could create a state machine program to accept amounts like $1.50 for a vending machine, then use the scratch stickers to reveal random coinsSure, you can use a random number generator, but a physical sheet gives a more memorable experience
(DIR) Post #AnlO94BUXBR66Ccu5Q by mansr@society.oftrolls.com
2024-11-06T10:37:33Z
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@futurebird A stack of those sheets can be an EPROM. Program it by scratching off bits, erase by discarding the top sheet.