Have I correctly used ‘meanwhile’ and ‘from the start to the end’ in the sentence?

Have I correctly used ‘meanwhile’ and ‘from the start to the end’ in the sentence?

From the start to the end of the program, the university students sold foods and refreshments from makeshift stalls on the ground floor of the campus building. Meanwhile, their best portfolios and projects were displayed along the corridor on the second floor of the campus building.