Live data from Hacker News

How to draw dotted lines on chalkboards, MIT style (2021)

mitadmissions.org

101–110 of 124 posts

Re: How to draw dotted lines on chalkboards, MIT style (2021)

#102

I still find blackboard + chalk to be a heinous combination. Is this just because my grade school used cheap low-grade chalk? I do have a weird physiological reaction to 'fffffffff' friction sounds. A hard cheap pencil against cheap paper, making a similar raspy sound as chalk-on-blackboard, with cause me to reflexively (and uncontrollably) suck my lips in tight, as if protecting my teeth from the vibrations. Back in…

> Is it just... Definitely yes. Good chalk and good boards sound completely different.

I remember old blackboards made from a soft material, or a soft layer under the “black” part. These sounded very pleasantly, like the most thocc-y keyboards.

Newer boards came rock solid, and when they met a hard granule in a chalk, it made unbearable sqeaks and clacks.

Re: How to draw dotted lines on chalkboards, MIT style (2021)

#104
post #51

How is this MIT style? Many people using chalkboards all around the world do this.

This is from a blog by a student blogger for MIT Admissions, so it's explicitly meant to be MIT-centric, and probably the author hadn't seen it done anywhere else.

Re: How to draw dotted lines on chalkboards, MIT style (2021)

#105
post #55

I was at school in the 80s and 90s in the UK and this brings back very fond memories of a highly eccentric Latin teacher I had, who mastered this technique and used it frequently. The other memorable thing about him was how he'd tell us he was going to do some photocopying and head off with no paperwork, only to return 5 minutes later still with no paperwork but smelling of pipe smoke. Some more modern classrooms had…

I too was at school in the UK during the 80s and 90s and don't have any fond memories. Maybe because it wasn't a school with Latin in the curriculum. I had two science teachers: a young one and one nearing retirement. The young science teacher spent the whole lesson writing from his notes onto the blackboard, while the whole class just copied it verbatim. His only interaction was asking whether everyone had finished,…

I went to one of the best schools in England allegedly. We had a new English teacher who spent a whole year doing the silent notes on the blackboard thing. He would come in early so he could get a head start. We also had a PE/French teacher who couldn't speak French. Shit teachers are everywhere.

Re: How to draw dotted lines on chalkboards, MIT style (2021)

#107
post #70

I went to a talk by a grad student historian who studied how mathematical ideas evolved in Europe roughly 1600-1900. He started his talk by quickly drawing a damn near photorealistic map of Europe on the chalk board. Very impressive way to start a talk and make it memorable. It really impressed on me how lecturing can be developed like a performing art. I never leveled up my chalkboard skills, but there were definite…

> but there were definitely times when I distracted myself from proofs that wouldn’t work by learning how to make beautiful diagrams in latex + tikz.

I have never, ever, regretted coming to the table with eye candy like this. Were some of those investigations the most "profitable" thing to be working on at the time? Probably not, but a good, clean visualization buys you so much cred with both your audience and yourself.

Re: How to draw dotted lines on chalkboards, MIT style (2021)

#108
My electronics instructor did this really well. He would use multiple colors of chalk and draw dashed lines perfectly, also just as fast as he could draw a normal line.

Really nice to see it done well. I never used chalk enough to develop tricks or even proper technique.

Re: How to draw dotted lines on chalkboards, MIT style (2021)

#109

I still find blackboard + chalk to be a heinous combination. Is this just because my grade school used cheap low-grade chalk? I do have a weird physiological reaction to 'fffffffff' friction sounds. A hard cheap pencil against cheap paper, making a similar raspy sound as chalk-on-blackboard, with cause me to reflexively (and uncontrollably) suck my lips in tight, as if protecting my teeth from the vibrations. Back in…

Good chalk on a good board should sound like a light hiss, not a lot of 'ffffff'.

and then there is fingernails on a chalkboard...

Re: How to draw dotted lines on chalkboards, MIT style (2021)

#110

I still find blackboard + chalk to be a heinous combination. Is this just because my grade school used cheap low-grade chalk? I do have a weird physiological reaction to 'fffffffff' friction sounds. A hard cheap pencil against cheap paper, making a similar raspy sound as chalk-on-blackboard, with cause me to reflexively (and uncontrollably) suck my lips in tight, as if protecting my teeth from the vibrations. Back in…

One technique to deal with shitty quality chalk/chalkboard that worked for me was to dip the chalk in water.
Post reply on HN