Apologies for not using the provided template, the help I require is not spoon-fed, more a method of directing me in the right direction hopefully. For my Physics coursework, I chose the rather simplistic thermistor experiment rather than being bold and going for a slightly more adventurous type of rotary potentiometer experiment. Anyway, I understand the basic principles of the thermistor, like it's negative coefficient of temperature etc, but I'm having trouble reaching the top grade boundary. I've noticed that dividing the graphs into segments (such as 10 degrees centigrade) causes the relationship to become linear and not exponential, yet I cannot explain why. I've worked out it's equation of ΔR = kΔT, I just don't understand why it happens (if indeed there is any worthwhile Physics behind it). Another problem is my explanation of why the thermistor differs to a metal with an increase in temperature. I've got the whole collision of charge carriers in metals causes resistance to increase, whilst in a thermistor it just releases more charge carriers, but am struggling to delve into it in more detail. I'm not expecting spoon-fed answers, but any help that can be provided will be much appreciated.