Number Groups
Master each group to unlock the next. Reach 80% accuracy with 10+ drills to progress.
Basic Numbers
Foundation: zero through ten
Teens
The -náct pattern (11-19)
Tens & Compounds
Decades and compound numbers
Hundreds
Sto, dvě stě, and beyond
Select a Number Group
Click on an unlocked group above to see the numbers and patterns. Master each group by reaching 80% accuracy with at least 10 practice drills.
Foundation Numbers (0-10)The -náct Pattern (11-19)Decades: -cet vs -desátHundreds: sto, stě, sta, set