Led 20 students download and install R and Rstudio.
Then run sample R code to analyze the class data on hemocytometer.
=> Problems:
-> Many students did not ZIP file and how to extract them. On windows computer, the R code can be openned directly using Rstudio, but now xlsx or csv files.
-> R package 'xlsx' lead to runtime error on Yosemite Rstudio. I had to convert xlsx to csv files for these students to run the codes. Lessons: Simple methods are always safer than fancier ways in classrooms.
=> Solutions
-> I went step-by-step on screen, and make sure most students caught up.
-> I ask students who finished the steps to help students that were stuck.
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