Appreciated work, very impressive because it is related to human rights. I also like such kind of work and I also want to be a member of this research council. People like to listen news related to their rights.
As some previous commenters pointed out, it would depend on the type of online game. The "skills" and "knowledge" gained from playing, for example, an online "playhouse" or "dress up" game probably doesn't correlate with standardized test scores. But playing a word game or solving a puzzle online is a completely different ballgame. Even for more difficult word games, such as crossword puzzles, kids can reference an online crossword helper that can provide lessons in resourcefulness, how to use the process of elimination and critical thinking while also exercising underutilized parts of the brain.
It'd definitely be interesting to investigate whether a relationship exists between solving daily or weekly crossword puzzles and changes in standardized test scores. You could have student participants take standardized tests before and after the study. One experimental group could be tasked with solving daily crosswords and one could be tasked with doing so weekly. The control group, of course, would be those who didn't engage in solving crosswords of any kind.