Comparing & Measuring
Compare groups, sizes, and amounts, even when they look different.
48 pages you can open and draw on right here.
Bali: Ocean Balance · Bali · Which pan is lower? · Age 2.5-3
Compare the bottoms of the two pans. Which one is closer to the bottom of the picture?
Bali: Ocean Balance · Bali · Which pan has more? · Age 4
Touch each pearl once as you count. Remember the pearls behind the front ones.
Bali: Ocean Balance · Bali · Make both pans match! · Age 5
Pair one pearl on the left with one on the right. Which right-side pearls still need a partner?
Bali: Ocean Balance · Bali · Balance the scale! · Age 6-7
Count both groups first. How can you make them match by drawing? Then count only the pearls you added.
Bivo: Magic Changes · Bivo · Set A: Find the biggest · Age 2.5-3
Compare the three boxed moons. Which takes up the most space?
Bivo: Magic Changes · Bivo · Set B: Find more · Age 2.5-3
Pair a potion in one box with a potion in the other. Is any potion left without a partner?
Bivo: Magic Changes · Bivo · Set A: Make it smaller · Age 4
Compare each choice with the starting moon. Which one has shrunk?
Bivo: Magic Changes · Bivo · Set B: One more potion · Age 4
Count the starting group, then show one extra finger. Find the group that matches.
Bivo: Magic Changes · Bivo · Set A: Same moon, new size · Age 5
Check two things: is it still the same kind of object, and has its size changed?
Bivo: Magic Changes · Bivo · Set B: One potion disappears · Age 5
Cover one starting potion with your finger. Which box matches what remains?
Bivo: Magic Changes · Bivo · Set A: Work the magic backward · Age 6-7
For the second question, undo the change. What must the moon have looked like before the shrinking?
Bivo: Magic Changes · Bivo · Set B: Magic both ways · Age 6-7
Use Answer to choose or build your answer on the page. Use Pen to draw and color. You can erase, undo, and try again.
Falo: Raincloud Cups · Falo · How many cups have water? · Age 2.5–3
Touch each cup once before choosing the matching dots.
Falo: Raincloud Cups · Falo · Match the rain level! · Age 4
Compare the water surface with the marks on the side.
Falo: Raincloud Cups · Falo · Pour it to the line! · Age 5
Start at the bottom and find the line with the drop beside it.
Falo: Raincloud Cups · Falo · One drop away! · Age 6–7
Use the marked level in the reference. Which cups are exactly one mark away?
Juno: Rocky Climb · Juno · Find more · Age 2.5–3
Match pebbles across the two shelves. Which group has some left without a partner?
Juno: Rocky Climb · Juno · Help Juno climb · Age 4
Use Answer to choose or build your answer on the page. Use Pen to draw and color. You can erase, undo, and try again.
Juno: Rocky Climb · Juno · Count only pebbles · Age 5
Use Answer to choose or build your answer on the page. Use Pen to draw and color. You can erase, undo, and try again.
Juno: Rocky Climb · Juno · Most and fewest · Age 6–7
Use Answer to choose or build your answer on the page. Use Pen to draw and color. You can erase, undo, and try again.
Kena: Cozy Roost Quilt · Kena · A snug fit · Age 2.5–3
Compare the strip’s ends with the ends of the empty row.
Kena: Cozy Roost Quilt · Kena · Finish the row · Age 4
Count only the empty spaces in Kena’s row.
Kena: Cozy Roost Quilt · Kena · Find the leaf strip · Age 5
Check two things: will it fill the gap, and does it have leaves?
Kena: Cozy Roost Quilt · Kena · One row, two views · Age 6–7
First count the whole row. Then count just the empty part.
Kuvi: Balance Builder · Kuvi · Find the same shell · Age 2.5–3
Compare the outlines of the shells.
Kuvi: Balance Builder · Kuvi · Add the dots · Age 4
The dots tell you weight. Add all the dots within each choice.
Kuvi: Balance Builder · Kuvi · Look at both pans · Age 5
Remember the shell already on the right. How much is still missing?
Kuvi: Balance Builder · Kuvi · Solve both changes · Age 6–7
After each change, compare the total weight on both pans again.
Coro: Coral Picture Chart · Coro · Which has more on the chart? · Age 2.5–3
Look only inside the chart. Pair one item from each column.
Coro: Coral Picture Chart · Coro · One treasure is in the wrong column · Age 4
Compare each treasure with the label under its column.
Coro: Coral Picture Chart · Coro · Build a treasure chart · Age 5
Give each treasure one space in the column with its matching picture.
Coro: Coral Picture Chart · Coro · Compare Coro’s treasure columns · Age 6–7
Match the columns row by row. Where are there spaces without a partner?
Nesa: Underwater Shoals · Nesa · Look and point · Age 2.5–3
Match a pearl in each bowl. Does one bowl still have pearls left?
Nesa: Underwater Shoals · Nesa · Compare and circle · Age 4
Touch each pearl once as you compare the groups.
Nesa: Underwater Shoals · Nesa · Look closely and color · Age 5
Find the smooth round pearls before counting.
Nesa: Underwater Shoals · Nesa · Compare, then make it equal · Age 6–7
Pair pearls across the bowls. How many in the larger group still need a partner?
Rubi: Stick Bridges · Rubi · Look, compare, and point · Age 2.5–3
Imagine lining up one end of each stick. Which reaches farthest?
Rubi: Stick Bridges · Rubi · Find the missing length · Age 4
Compare with the empty part, not the whole bridge.
Rubi: Stick Bridges · Rubi · Two sticks, one bridge · Age 5
The question needs two sticks. Imagine them touching end to end.
Rubi: Stick Bridges · Rubi · Look at the part and the whole · Age 6–7
Measure the missing part first. For the whole bridge, include the part already built.
Tilo: Hay Bale Steps · Tilo · Compare and point · Age 2.5–3
Compare how much space the two bales take up.
Tilo: Hay Bale Steps · Tilo · Find the missing size · Age 4
Compare each choice with both neighbors.
Tilo: Hay Bale Steps · Tilo · Find the bale that breaks the order · Age 5
Cover one bale at a time. Does every next bale get bigger?
Tilo: Hay Bale Steps · Tilo · Put in order, then find a new place · Age 6–7
Use Answer to choose or build your answer on the page. Use Pen to draw and color. You can erase, undo, and try again.
Vela: Pawprint Trail · Vela · Follow Vela! · Age 2.5–3
Touch each whole pawprint once, rather than counting its toe marks.
Vela: Pawprint Trail · Vela · The busiest trail · Age 4
Count each row separately before comparing.
Vela: Pawprint Trail · Vela · Vela’s little tracks · Age 5
Check the tips above the toes. Which prints have no claw marks?
Vela: Pawprint Trail · Vela · Look twice! · Age 6–7
Use Answer to mark the cat prints. Tap each dog print to connect it to a different cat print. Then enter both numbers. Use Pen to color.