: Practical guides that explain the fundamental "fingering" techniques (using the thumb and index finger) to move beads.
: Training the right hemisphere through spatial recognition of bead patterns. Speed Drills : Exercises designed to reduce reaction time. mentalnaia arifmetika knigi skachat
Beyond the "wow factor" of multiplying four-digit numbers in seconds, mental arithmetic fosters: : Practical guides that explain the fundamental "fingering"