School science laboratories seem to always be designed by accountants. They are generally poorly laid out and ill-equipped to serve their purpose.I have taught in many of these disasters and have designed other labs that have been a pleasure to teach in.
It would be nice if price was not a constraining factor in all school building design, but it is.The best way to approach the design of your lab is from the stand-point of what you need, then pare it down if the total cost is over-budget.
A school laboratory is usually larger than the average classroom. This is because it may have 35 students moving around it, flames from Bunsen burners, sinks, electrical equipment and glassware all at the same time, as well as writing materials, computers and boards. The whole setup sounds impossible.
Ideally you need to separate student writing areas from student experimental areas. The easiest way to do this is to have sinks, electrical outlets and workbenches around the three sides of the room. Cupboards for glassware and electrical equipment will slot underneath these workbenches. There needs to be a clear walkway all around the room in front of these workbenches, so...