In the same place where you found MarkCalc, we will put folders containing the lab assignments. For example, to do Lab 1, select the Lab 1 folder to open it, and you will find the experiments (experiment 1, experiment 2, etc.). To start up an experiment, double-click on the icon.
If you don't see a lab folder for a particular lab assignment (e.g. Lab 1), the assignment is not yet ready to go. If the lab folder does not have a particular experiment, you are supposed to carry out that experiment using the regular MarkCalc.