Online courses
I do have German online courses on structural equation modelling in lavaan and basic statistics in PSPP. Furthermore, in a course on survey data collection using LimeSurvey teaches you learn about collecting data efficiently and effectively.
Data
Random Dataset for Exercises and Exams: Randomly generated dataset ideal for playing around with correlation and regression. This is somewhat outdated, here is the new project.
Froehlich et al 2014 short: Shortened dataset of actual research data
Exercises
Data Cleaning Exercise: DataCleaning Codebook DataCleaning Data DataCleaning Data DataCleaning Data_cleaned DataCleaning DataCleaning (Angabe)