fixing tech training
fixing tech training


Former-commit-id: 0edd52bee1ac2928ca6fd591d39fb7f42943db8b [formerly 591770a6ae3ddd9cf023821158527e344a8b27e8] [formerly 09fa3303c514ec3873289a0263c5237073ae9e30] [formerly ee587192e2c5c193bb6923773bc2ebc18e80dae1]
Former-commit-id: bdb6ad82b3182ff8f793df2ca3f2dc9af3e7622c
Former-commit-id: ce4d3f443b8e8ad6f5a5c6b72fd8875f99438e1b
Former-commit-id: c00791969a61089f745932a7ddbcc81bdc3fc6e0
StanfordHCI/cs247,StanfordHCI/cs247,StanfordHCI/cs247