Updated the talk on determinants and vector space.
Merge pull request #62 from KellyBlack/black_dev

Updated the talk on determinants and vector space.
minor change on the note week8friday
Merge branch 'yao_dev' of github.com:guangmingyao/ODE-Recitation-Activities into yao_dev
Updated and reformatted the lecture on linear indepence.
Merge pull request #63 from KellyBlack/black_dev

Updated and reformatted the lecture on linear indepence.
Updated the discussion on eigen vectors
Changed the wording of two clicker quizzes.
conflict
conflict
Updated the introduction to systems of DEs
Merge pull request #65 from KellyBlack/black_dev

Updated the introduction to systems of DEs
minor changes on wed note for week 9
fixed conflict
minor changes on solving systems
Merge pull request #37 from guangmingyao/yao_dev

Yao dev