30 written chapters · 1 published teaching videos
Grade 2, one chapter at a time.
Connect place value to calculation and use equal groups, measurement, and simple data to organize everyday questions. Pictures and spoken explanations remain part of the mathematics.
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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
Bundle ten tens into a hundred
Represent three-digit numbers with hundreds, tens, and ones.
Written lesson available · video pending
Study this chapterChapter 2 · Algebra
Write a number in expanded form
Explain zero as a placeholder in a three-digit number.
Written lesson available · video pending
Study this chapterChapter 3 · Algebra
Compare three-digit numbers
Compare numbers at their first different place.
Written lesson available · video pending
Study this chapterChapter 4 · Algebra
Find positions on a hundred line
Locate a number between labeled tens on an equally spaced number line.
Written lesson available · video pending
Study this chapterChapter 5 · Algebra
Count by twos and fives
Choose a skip count that matches a repeated group size.
Written lesson available · video pending
Study this chapterChapter 6 · Algebra
Make pairs to test even and odd
Classify whole numbers by whether every object can be paired.
Written lesson available · video pending
Study this chapterChapter 7 · Algebra
Add hundreds, tens, and ones
Add multi-digit numbers by matching place values without regrouping.
Written lesson available · video pending
Study this chapterChapter 8 · Algebra
Trade ten ones when adding
Regroup ten ones as one ten in two-digit addition.
Written lesson available · video pending
Study this chapterChapter 9 · Algebra
Subtract matching place values
Subtract by hundreds, tens, and ones when no trade is needed.
Written lesson available · video pending
Study this chapterChapter 10 · Algebra
Exchange a ten to subtract
Rename a ten as ten ones before subtracting.
Written lesson available · video pending
Study this chapterChapter 11 · Algebra
Make an easier sum by moving one
Keep a sum unchanged while moving an amount between addends.
Written lesson available · video pending
Study this chapterChapter 12 · Algebra
Estimate with the nearest ten
Round a whole number to the closest multiple of ten.
Written lesson available · video pending
Study this chapterChapter 13 · Algebra
Follow a two-step change
Track an intermediate total before the next change.
Written lesson available · video pending
Study this chapterChapter 14 · Algebra
Work backward to find the start
Undo a change when the final amount is known.
Written lesson available · video pending
Study this chapterChapter 15 · Algebra
Read an array by rows and columns
Represent equal rows as repeated addition.
Written lesson available · video pending
Study this chapterChapter 16 · Algebra
Share a collection fairly
Separate a whole into equal groups by distributing one at a time.
Written lesson available · video pending
Study this chapterChapter 17 · Geometry
Recognize three equal shares
Name one of three equal parts as a third.
Written lesson available · video pending
Study this chapterChapter 18 · Geometry
More equal pieces means smaller pieces
Compare a half and a quarter of the same whole.
Written lesson available · video pending
Study this chapterChapter 19 · Geometry
Measure from a ruler's zero mark
Use interval differences when measuring with a ruler.
Written lesson available · video pending
Study this chapterChapter 20 · Geometry
Choose centimetres or metres
Connect one metre to one hundred centimetres.
Written lesson available · video pending
Study this chapterChapter 21 · Geometry
Read minutes in fives
Use clock numbers as groups of five minutes.
Written lesson available · video pending
Study this chapterChapter 22 · Geometry
Count time across the next hour
Find elapsed time by stopping at a whole hour.
Written lesson available · video pending
Study this chapterChapter 23 · Algebra
Count coins by value
Separate the number of coins from their total value.
Written lesson available · video pending
Study this chapterChapter 24 · Algebra
Find change from one dollar
Count up to a dollar using one hundred cents.
Written lesson available · video pending
Study this chapterChapter 25 · Statistics
Read tally marks in fives
Group tally marks to organize a count.
Written lesson available · video pending
Study this chapterChapter 26 · Statistics
Read a bar graph with a scale
Interpret bar heights using equally spaced numerical labels.
Written lesson available · video pending
Study this chapterChapter 27 · Statistics
Use a picture key worth two
Translate picture symbols into counts using a stated key.
Written lesson available · video pending
Study this chapterChapter 28 · Geometry
Measure all the way around
Add boundary side lengths to find a polygon's perimeter.
Written lesson available · video pending
Study this chapterChapter 29 · Geometry
Cover a rectangle without gaps
Count equal square tiles covering a rectangular region.
Written lesson available · video pending
Study this chapterChapter 30 · Algebra
Describe a growing number pattern
Identify a constant additive rule and extend it.
Written lesson available · video pending
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