4 ms·It is a great teaching tool (and very usable if you need to get something simple done quickly).by ISL 4y agoIt is a great teaching tool (and very usable if you need to get something simple done quickly).uuyi 4y agoIt's not a good teaching tool if it tells people to do stuff entirely the wrong way against every bit of engineering experience out there, which is exactly what it does.nrdgrrrl 4y ago