Place Value Unlocked

Place Value Unlocked teaches K–2 students how numbers work — from grouping tens and ones all the way to hundreds, expanded form, comparing numbers, reading and writing numbers, and rounding.
Built by educators with 20+ years of classroom experience, this app uses interactive base ten blocks, visual place value mats, and a world-by-world progression to make abstract number concepts concrete and memorable.
7 Worlds of Learning:

World 1: Why We Group — discover how and why we organize numbers into tens and ones
World 2: Tens and Ones — identify the tens and ones digits in two-digit numbers
World 3: Expanded Form — break numbers into their parts (40 + 7 = 47)
World 4: Reading & Writing Numbers — connect numerals to their word forms
World 5: Comparing Numbers — use greater than, less than, and equal to
World 6: Hundreds, Tens, and Ones — extend place value understanding to three-digit numbers
World 7: Rounding — round to the nearest ten and hundred

Place Value Master Challenge:
Complete all 7 worlds and take on the ultimate 40-question timed challenge. Earn your Certificate of Achievement from One On One Tutoring Service!
Designed for Young Learners:
Every tip uses language K–2 students already know — counting by tens, adding, and grouping. No multiplication. No shortcuts. Just deep understanding built the right way.
Worlds 1 and 2 are free. Unlock all 7 worlds for a one-time purchase of $2.99.