👩🏫 Teaching Guide • Kindergarten
How to Teach Counting to 20 — Kindergarten Guide
Building on counting to 10, this guide helps children understand teen numbers as composed of 10 ones and some additional ones, laying the groundwork for place value.
📐 Standards Alignment
K.CC.A.1 CCSS.MATH
Count to 100 by ones and by tens.
K.CC.B.4 CCSS.MATH
Understand the relationship between numbers and quantities.
K.NBT.A.1 CCSS.MATH
Compose and decompose numbers from 11 to 19 into ten ones and some further ones.
📦 Materials Needed
- Two ten-frames
- Counters or small objects
- Number line 1-20
- Number cards 11-20
🎯 Teaching Strategies
💡
Use Double Ten Frames Fill one ten-frame completely (10), then add counters to the second frame. This visually shows that 14 is "10 and 4 more."
💡
Connect to Known Numbers When introducing 15, say "You know 5, right? 15 is just 10 and 5 more. Ten-five... fif-teen!"
⚠️ Common Misconceptions
❌ Misconception: Confusing teen numbers with tens (13 vs 30)
✅ Correction: Use ten frames consistently. Show that 13 is one full frame + 3, while 30 would be three full frames.
📊 Differentiation Tips
Struggling
Master 1-10 first. Then add one number at a time: learn 11, practice, then 12, etc.
Advanced
Count by 2s or 5s to 20. Practice counting backward from 20.
🚀 Extension Activities
- Play "20 Questions" using number clues
- Make a number poster with drawings for each number 1-20