deletions | additions       diff --git a/untitled.tex b/untitled.tex  index e39fb8e..57fe9c6 100644  --- a/untitled.tex  +++ b/untitled.tex 
...
\item 45 minutes for section 2  \item 90 minutes for section 3  \end{itemize}  As the previous year’s summary notes, it’s better to mark each section as you go. It might also be advisable to give a demonstration of how to quickly determine means, standard deviations and standard errors using graphical calculators.\\ calculators. Most of the students do not know how to use a Vernier calliper and often they ask where are the balances. It might be a good idea to show how to use these instruments and to point out where they are at the beginning of the Intro lab. Each semester on the Intro lab we have a miscommunication issue between the demonstrators. Please, come at least 15 minutes before the lab and discuss with your colleagues what are the answers for the practical questions and how do we solve it, especially if it is your first time or you forgot what it was from the last time when you did demonstrations. And do not argue with your colleague in front of the students! Never! Even if you think that your colleague is wrong. Please, have a word with him/her when he/she will walk away from the student. Many times I saw how demonstrators correct each other in front of the students and students always get confused as they don’t know who is right and who is wrong. Or sometimes they ask the same question to different demonstrators and when they get different answers they don’t know what to think. If they say that another demonstrator told you something else and you think it is wrong, ask them to wait, have a word with your colleague and then you both should explain to the student what should be done.\\  \phantom{1}\\  \textbf{Practice Problem - Approach and Solutions}  \begin{enumerate}