30 written chapters · 2 published teaching videos
Grade 1, one chapter at a time.
Explore how numbers describe collections, how addition joins them, and how subtraction changes them. Use familiar objects to build confidence before moving to written symbols.
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Short explanations with animated examples, captions, and a full transcript. Each video opens beside its matching practice question so you can try the idea yourself.
31 secGrade 1 · AI-assisted teaching
Subtraction you can see: twelve minus two
AI-assisted presenter with an American male AI voice. Watch twelve counters become ten when two move into the tray, then check the result by putting them back: 12 − 2 = 10 and 10 + 2 = 12.
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26 secGrade 1 · AI-assisted teaching
Addition: four join three
AI-assisted presenter with an American male AI voice. Watch four counters join three to make seven, then add one more and count eight. Try the same addition question after the clip.
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Explore the complete written study sequence
2 short teaching clips are available above, each linked to its exact practice question. Every chapter below opens a written lesson with worked examples and practice. Full lesson recordings are being prepared; the interactive animations are available now.
Explore this level’s 100 interactive animationsFollow the learning sequence
Chapters and video availability
Each chapter follows an existing academy lesson. Numbers match the written study order; grade placement is a guide and school sequences may vary.
30 of 30 chapters · in study order
Chapter 1 · Algebra
Count every object once
Match one counting word to each object.
Written lesson available · video pending
Study this chapterChapter 2 · Algebra
Zero means none
Use zero to describe an empty group.
Written lesson available · video pending
Study this chapterChapter 3 · Algebra
One more and one less
Find neighbors of a number by moving one counting step.
Written lesson available · video pending
Study this chapterChapter 4 · Algebra
Compare groups by matching
Decide which group has more using pairs.
Written lesson available · video pending
Study this chapterChapter 5 · Algebra
Put three counts in order
Order three whole numbers from least to greatest.
Written lesson available · video pending
Study this chapterChapter 6 · Algebra
Positions in a line
Distinguish an object's position from a group's size.
Written lesson available · video pending
Study this chapterChapter 7 · Algebra
See five and some more
Use a group of five to recognize a total without recounting.
Written lesson available · video pending
Study this chapterChapter 8 · Algebra
Find the missing part of ten
Compose ten from two smaller groups.
Written lesson available · video pending
Study this chapterChapter 9 · Algebra
Teen numbers are ten and ones
Build a teen number from one ten and extra ones.
Written lesson available · video pending
Study this chapterChapter 10 · Algebra
Addition joins two groups
Represent a joining story with an addition equation.
Written lesson available · video pending
Study this chapterChapter 11 · Algebra
Count on from the larger part
Add a small number by counting forward from a known amount.
Written lesson available · video pending
Study this chapterChapter 12 · Algebra
Build equal-pair doubles
Recognize a double as two equal addends.
Written lesson available · video pending
Study this chapterChapter 13 · Algebra
Use a double to add neighbors
Find a near double by adjusting one equal pair.
Written lesson available · video pending
Study this chapterChapter 14 · Algebra
Add by stopping at ten
Split an addend to make ten first.
Written lesson available · video pending
Study this chapterChapter 15 · Algebra
Subtraction removes a part
Use subtraction to describe items leaving a group.
Written lesson available · video pending
Study this chapterChapter 16 · Algebra
How many more?
Use subtraction to compare two separate counts.
Written lesson available · video pending
Study this chapterChapter 17 · Algebra
Find the hidden addend
Solve for a missing part when the total is known.
Written lesson available · video pending
Study this chapterChapter 18 · Algebra
Connect addition and subtraction
Use the same three numbers in related addition and subtraction facts.
Written lesson available · video pending
Study this chapterChapter 19 · Algebra
The equal sign means the same amount
Interpret equality as balance between two values.
Written lesson available · video pending
Study this chapterChapter 20 · Algebra
Count groups of ten
Count complete tens and connect them to two-digit numbers.
Written lesson available · video pending
Study this chapterChapter 21 · Algebra
Add ten without changing the ones
Add a group of ten to a two-digit count.
Written lesson available · video pending
Study this chapterChapter 22 · Geometry
Order objects by length
Compare lengths by aligning one endpoint.
Written lesson available · video pending
Study this chapterChapter 23 · Geometry
Measure with equal units
Measure length using repeated units without gaps or overlaps.
Written lesson available · video pending
Study this chapterChapter 24 · Geometry
Read whole hours
Read an analog clock when the minute hand points to twelve.
Written lesson available · video pending
Study this chapterChapter 25 · Geometry
Sort flat shapes by their sides
Identify triangles and quadrilaterals from sides and corners.
Written lesson available · video pending
Study this chapterChapter 26 · Geometry
Notice flat and curved surfaces
Distinguish basic solid shapes by observable surfaces.
Written lesson available · video pending
Study this chapterChapter 27 · Geometry
Split a whole into equal halves
Recognize two equal-size parts as halves.
Written lesson available · video pending
Study this chapterChapter 28 · Geometry
Four equal shares
Recognize quarters as four equal parts of one whole.
Written lesson available · video pending
Study this chapterChapter 29 · Statistics
Read a one-picture graph
Read a picture graph when each picture means one item.
Written lesson available · video pending
Study this chapterChapter 30 · Algebra
Find the repeating unit
Identify and extend the smallest repeating block in a pattern.
Written lesson available · video pending
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