You may like to refer to Speaking Test of IELTS and Password. There are also many strategies to untie the tongue of learners. I can send some time later. I hope the above helps!
If the presentation and forum is very important. I just follow a simple thumb rule of practising on and on till i don't need to see my presentation at all. This way you develop a "cache memory" also known as "muscle memory".
I suggest sometimes memory learning may deceive perhaps due to lack of confidence. It is advisable to understand and digest the ideas, contextualize, use acronyms and formulae because they can stay in mind for ages. After this homework repeated practice may support a person. I hope this helps!