>> susan osterhaus:but i will cut out one that i have over here. let's see where is that one. this one is a tetrahedron,and in case you forget, what's nice about this for thesighted person that's helping is that the name, again,is right there. tetrahedron net. so you'll know what it is. now what you're going tohave your students do is
after you have gone ahead andmade these, if you want them to have some fun, too,you can let them put it through the machine, butdepending on how good they are with scissors, they can cut theentire thing out themselves, and what i'm saying there is,and i want to show you exactly. you would cut around the edges. [ cutting sounds ] >> susan osterhaus:that's the parameter. >> susan osterhaus: soall we're doing is cutting
around the edges. now, your students shouldbe able to also feel these. so basically they're going tojust trying to fold along those, what they're feeling there. along those lines. ok. got one more here. and you just want tobe able to do this so that they'll be able to fold. i mean, this is what they'regoing to be doing, and,
you know, let them playwith it for a little while. have some scotch tape ready. so in case they want to doit one little bit at a time, they can go ahead, andi'm terrible, by the way, with scotch tape, etc., buti'm going to try to do my best. let me get the wholething kind of together to make sure i'vegot it in here. and let me tell you, yourstudents will be better than me, but anyway, i'm goingto try to get this
to scotch tape together. and what they've nowmade, they had that net. let me put a littlemore scotch taping. i need lots of scotchtape on mine. and what they have made. you should have seen,i had a workshop, and all the participantswere running around with their littletetrahedrons and octahedrons, etc. so there is your, see.
it should be the same on all sides except i thinkit looks it a little better from certain angles. there. or i think thatangle looks the best. ok. so you've made yourtetrahedron, and believe me, them actually putting that nettogether is what's so important because looking at somethinglike this and figuring out that it folds upto something like that, it really needs themhaving that real experience
of cutting it up and doing that. what you can also do withthese, if you have a whole bunch of them and a lot of studentsin the class or whatever, you can take these, andwe made a mobile that hung from the ceilingof the classroom. so just in case you don'tknow what to do with these after you're finished. ok. so that's all you haveto do to create certain nets, and like i mentioned, ihave this particular one,
which i didn't put together. this is a dodecahedron, andthat means it has 12 pentagons,
nets of 3d shapes to print,and by the time youput it together, you get this three dimensionalobject called a dodecahedron. if you have a shape like this,you fold this all together, and you've got an octahedron.
