Using laptop to conduct class test

I am teaching social studies to class IV A, and there are 20 students in my class.
At the end of each topic i conduct class test giving the competency based qiestions(bcsea) to check how much they have learned and familiarize the different types of questions. Usually i write the questions on the board and let them copy.
Now i am using my laptop to give them the questions it really saves the time. I even taught them how to browse the questions using their smartphones.
Using ict facilities teachers saves their time  and energy but the learners enthusiastically learn more.