Good introductory reference/lecture notes to finite element analysis for PDEs

Question

I am a graduate student planning to take an introductory mathematical finite element theory course this fall.

Is there any recommended, based on your experience, (preferably available online) source to familiarize myself with the field?

I am particularly looking for a source that excels in explaining main ideas in a clear manner rather than going through long derivations and proofs (which I will get enough of during the semester!)

Thanks in advance

Answer 1

I recommend Professor Chen Long's FEM notes to you: https://www.math.uci.edu/~chenlong/226/Ch2FEM.pdf.