Let me explain in brief.
There’s a lot of TOEFL-related free content available on the web. Although, most of it lacks some important aspects of a good practice resource, like, the similarity to the actual test, precise techniques, explanations, updates as per test-requirement changes, healing the pain points, and giving a feeling of trust. TST prep’s online free material overcame all of these challenges.
I am a working professional and didn’t have the time to attend TOEFL Prep lectures, so, I had to plan out my own timetable to prepare for it. Then I came across TST prep’s listening practice test series on YouTube. I attempted it and scored a ridiculous grade, but that’s what I was looking for! The material is an exact replica of what one would expect as per the latest TOEFL iBT test. I watched more & more videos and attempted more free tests and my scores improved drastically.
A quick tip. Search these two pdfs: TOEFL Reading practice 100 questions, &, TOEFL writing section techniques. If you solve them and read the explanations for wrong answers properly, you’d see a quick and huge improvement in your reading, and writing section.
Why I am writing this wordy review? I scored an R 28, L 26, S 28, and W 28 score on my first attempt, a collective 110. If you use the free material on TST prep and prepare adequately, I think you can do so too!
