I recently bought online course form educba on programming in C as I was not that good in programming and it was necessary for me to know about properly. Class room teaching was fine but repeating everything from the be hectic.
I went through this syllabus and same as the prescribed syllabus given to us. I was impressed by the course as it was well illustrated with examples and animations were decent. I went through the course and repeated when ever I felt necessary. They also conducted an online test and I did well most of my confusions went away. Overall, it is a very nice course on internet.