I have turned to youtube for educational programming. There are some great math, science and history posters on there.
http://www.youtube.com/user/numberphile/videos
http://www.youtube.com/channel/UCHnyfMqiRRG1u-2MsSQLbXA
http://www.youtube.com/channel/UC2C_jShtL725hvbm1arSV9w
http://www.youtube.com/user/numberphile/videos
http://www.youtube.com/channel/UCHnyfMqiRRG1u-2MsSQLbXA
http://www.youtube.com/channel/UC2C_jShtL725hvbm1arSV9w