Chromebook for class (forbidden?) but currently working!

I am starting on App Academy Open and working through the beginning fairly well. It says (and I assume for later projects) I will need x, y, and z in a computer and a chrome book just will not cut it. Could you help me to understand when I will need the new computer? Money is a bit tight right now and a new computer would break the bank. For reference I am at about halfway through arrays.

Thanks in advance!