wat you're going thru, i've also been thru it & I know how
you must be feeling..
for me I took, EOA insteaf of POA & just be prepared to hear
breaking of test tubes or wat other fragile stuffs..
the person sitting beside you on either side & behind you
better know what they are doing during the science pratical
otherwise..........
ya the test tube breaking very scary
tat time in normal lesson
my friend heat until the test tube break 
ever since then he scare to hit test tube alr 

actually chemistry ok, physic is the one im scare
i donno how to set up those shitty wire