Math With Mr DJ

23 free lessons · Grades 2–8

Math Video Lessons

Every Mr DJ lesson, with the steps written out underneath: a worked example to follow, the mistakes to watch for, and a free worksheet to practice. Watch it, read it, then try it.

Place value & whole numbers

10:06What Are Whole Numbers? Writing, Comparing and OrderingGrade 4 · Place value & whole numbers

Addition & subtraction

3:15Subtraction With Regrouping: Stacking and Base Ten BlocksGrades 2–4 · Addition & subtraction

Multiplication & division

5:15How to Do Short Division (No Remainders)Grades 4–6 · Multiplication & division

Factors & multiples

7:39Divisibility Rules for 2, 3, 4, 5, 6, 8, 9 and 10Grade 4 · Factors & multiples2:22Prime Factorization Using a Factor TreeGrades 4–6 · Factors & multiples19:32GCF and LCM: How to Find Them and Tell Them ApartGrade 6 · Factors & multiples

Fractions

6:03How to Find Equivalent FractionsGrades 3–4 · Fractions5:18How to Divide Fractions With Keep, Change, FlipGrades 5–6 · Fractions4:18How to Multiply Mixed NumbersGrade 5 · Fractions

Decimals & percents

9:57Decimal Place Value: Hundreds to ThousandthsGrade 5 · Decimals & percents6:38Long Division With DecimalsGrades 5–6 · Decimals & percents7:00How to Find the Percent of a Number With the 10-5-1% RuleGrades 6–7 · Decimals & percents11:44How to Estimate With Percents Using Friendly NumbersGrade 7 · Decimals & percents

Order of operations

7:46Order of Operations Explained: How to Use PEMDASGrades 5–6 · Order of operations1:47Order of Operations With ExponentsGrade 6 · Order of operations

Expressions & equations

3:18Combining Like Terms With the Distributive PropertyGrades 6–7 · Expressions & equations11:15How to Solve Two-Step EquationsGrades 6–8 · Expressions & equations8:25Variables, Expressions and Equations: What's the Difference?Grade 6 · Expressions & equations

Integers & the coordinate plane

6:02How to Plot Points on the Coordinate PlaneGrades 5–6 · Integers & the coordinate plane10:31How to Find Absolute ValueGrade 6 · Integers & the coordinate plane

Geometry & measurement

14:303-D Figures and Nets: Faces, Edges and VerticesGrade 6 · Geometry & measurement8:06How to Use the Pythagorean Theorem (a² + b² = c²)Grade 8 · Geometry & measurement

Statistics

8:07How to Find Mean, Median, Mode and RangeGrade 6 · Statistics

What’s on each lesson page

  • The video, with links that jump straight to each step.
  • Step-by-step notes in Mr DJ’s own method, so you can follow along or catch up without pressing play.
  • A worked example with new numbers, and the common mistakes to check for.
  • A free worksheet for the same skill, and a daily puzzle that practices it.

Get new worksheets first

New worksheets, videos, and free resources from Mr DJ — about once a month. No spam, ever.