I know lots of people who spend hours a week working through sudoku squares, crossword puzzles, and brain training apps like Lumosity. Some folks no doubt genuinely enjoy these activities, doing them for leisure’s sake with little to no thought of their supposed “brain benefits”. I suspect, however, that the vast majority of people are forcing themselves through these puzzles because they want to keep their brain young, stave off neurodegenerative diseases, and improve cognitive firepower. The research does indeed seem to support the notion that doing difficult mental tasks can help change how one’s brain is wired and increase “neurogenesis” (a.k.a. “brain plasticity”), but as a biased language addict, I feel compelled to ask the obvious question: Given all the time and energy one spends trying to solve such puzzles, why not just learn a language instead?
Spaced Repetition Systems (or “SRS” for short) are flashcard programs designed to help you systematically learn new information—and retain old information—through intelligent review scheduling. Instead of wasting precious study time on information you already know, SRS apps like Anki allow you to focus most on new words, phrases, kanji, etc., or previously studied information that you have yet to commit to long-term memory. Read on to see how spaced repetition apps work and which SRS tools I recommend.