Series

Math with Mr. J

1084 episodes

A one-teacher math channel: Mr. J at a whiteboard, working problems out loud in three to ten minutes. The catalog runs heavily to procedure. Expect 2-digit by 2-digit multiplication with the standard algorithm, 3-digit by 1-digit, partial products and area models, and turning a decimal like 2.6 into a fraction by reading its place value, plus a full set of timed fact drills for every multiplication and division table from 2 through 12. Longer entries work practice problems on screen. No characters, no story. This is the review video you cue when a class needs the steps shown once more before independent work.

what this series covers

What Math with Mr. J covers

1084 episodes in the library, tagged for 1st–6th. Heaviest coverage: Math. Between them they line up with 85 distinct standards across 2 frameworks.

Episodes per grade

1st: 10
2nd: 50
3rd: 296
4th: 522
5th: 569
6th: 347

Episodes per subject

Math: 1084

Common Core — Math 84

6.RP.A.3Use ratio and rate reasoning to solve real-world and mathematical problems, e.g., by reasoning about tables of equivalent ratios, tape diagrams, double number lines, or equations.
4.NF.B.3Understand a fraction a/b with a > 1 as a sum of fractions 1/b; decompose a fraction into a sum of fractions with the same denominator; add and subtract mixed numbers.
4.NF.C.6Use decimal notation for fractions with denominators 10 or 100.
5.NBT.B.7Add, subtract, multiply, and divide decimals to hundredths, using concrete models or drawings and strategies based on place value.
4.MD.A.1Know relative sizes of measurement units within one system of units; express measurements in a larger unit in terms of a smaller unit.
4.OA.B.4Find all factor pairs for a whole number in the range 1–100; recognize that a whole number is a multiple of each of its factors; determine whether a number is prime or composite.

+ 78 more

5.MD.A.1Convert among different-sized standard measurement units within a given measurement system, and use these conversions in solving multi-step, real-world problems.
5.NF.A.1Add and subtract fractions with unlike denominators (including mixed numbers) by replacing given fractions with equivalent fractions with a common denominator.
5.NBT.A.3Read, write, and compare decimals to thousandths using base-ten numerals, number names, expanded form, and >, =, < symbols.
6.EE.A.2Write, read, and evaluate expressions in which letters stand for numbers.
6.NS.A.1Interpret and compute quotients of fractions, and solve word problems involving division of fractions by fractions.
4.NBT.B.5Multiply a whole number of up to four digits by a one-digit whole number, and multiply two two-digit numbers, using strategies based on place value.
6.EE.B.6Use variables to represent numbers and write expressions when solving a real-world or mathematical problem.
5.NF.B.7Apply and extend previous understandings of division to divide unit fractions by whole numbers and whole numbers by unit fractions.
6.SP.B.4Display numerical data in plots on a number line, including dot plots, histograms, and box plots.
6.SP.B.5Summarize numerical data sets in relation to their context, reporting the number of observations, measures of center, and measures of variability.
3.NF.A.3Explain equivalence of fractions in special cases, and compare fractions by reasoning about their size.
3.NF.A.1Understand a fraction 1/b as the quantity formed by 1 part when a whole is partitioned into b equal parts; understand a fraction a/b as the quantity formed by a parts of size 1/b.
3.OA.C.7Fluently multiply and divide within 100. By the end of Grade 3, know from memory all products of two one-digit numbers.
4.NBT.B.6Find whole-number quotients and remainders with up to four-digit dividends and one-digit divisors, using place value strategies and the relationship between multiplication and division.
5.NF.B.4Apply and extend previous understandings of multiplication to multiply a fraction or whole number by a fraction.
6.NS.B.3Fluently add, subtract, multiply, and divide multi-digit decimals using the standard algorithm for each operation.
3.OA.A.2Interpret whole-number quotients of whole numbers, e.g., interpret 56 ÷ 8 as the number of objects in each share when 56 objects are partitioned equally into 8 shares.
3.G.A.1Understand that shapes in different categories may share attributes, and that the shared attributes can define a larger category; recognize rhombuses, rectangles, and squares as examples of quadrilaterals.
4.G.A.2Classify two-dimensional figures based on the presence or absence of parallel or perpendicular lines, or the presence or absence of angles of a specified size; recognize right triangles.
5.G.B.3Understand that attributes belonging to a category of two-dimensional figures also belong to all subcategories of that category.
6.NS.B.4Find the greatest common factor of two whole numbers ≤ 100 and the least common multiple of two whole numbers ≤ 12; use the distributive property to express a sum.
6.NS.C.6Understand a rational number as a point on the number line; extend number line diagrams and coordinate axes to represent points with negative number coordinates.
5.NBT.B.5Fluently multiply multi-digit whole numbers using the standard algorithm.
5.NF.B.6Solve real-world problems involving multiplication of fractions and mixed numbers using visual fraction models or equations.
6.NS.C.5Understand that positive and negative numbers are used together to describe quantities having opposite directions or values; use positive and negative numbers to represent quantities in real-world contexts.
6.NS.C.7Understand ordering and absolute value of rational numbers.
5.NF.A.2Solve word problems involving addition and subtraction of fractions referring to the same whole, including cases of unlike denominators; estimate to assess reasonableness.
5.MD.B.2Make a line plot to display a data set of measurements in fractions of a unit; use operations on fractions to solve problems involving information presented in line plots.
2.MD.D.10Draw a picture graph and a bar graph to represent a data set with up to four categories; solve simple put-together, take-apart, and compare problems using the information.
3.MD.B.3Draw a scaled picture graph and a scaled bar graph to represent a data set with several categories; solve one- and two-step "how many more" and "how many less" problems.
3.MD.C.7Relate area to the operations of multiplication and addition.
4.MD.A.3Apply the area and perimeter formulas for rectangles in real-world and mathematical problems.
4.NF.A.1Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b) by using visual fraction models; use this principle to recognize and generate equivalent fractions.
6.EE.B.7Solve real-world and mathematical problems by writing and solving equations of the form x + p = q and px = q for cases in which p, q, and x are all nonnegative rational numbers.
4.NF.A.2Compare two fractions with different numerators and different denominators by creating common denominators or numerators, or by comparing to a benchmark fraction.
6.RP.A.1Understand the concept of a ratio and use ratio language to describe a ratio relationship between two quantities.
6.RP.A.2Understand the concept of a unit rate a/b associated with a ratio a:b with b ≠ 0, and use rate language in the context of a ratio relationship.
3.MD.A.1Tell and write time to the nearest minute and measure time intervals in minutes; solve word problems involving addition and subtraction of time intervals.
4.MD.C.5Recognize angles as geometric shapes formed wherever two rays share a common endpoint, and understand concepts of angle measurement.
4.MD.C.6Measure angles in whole-number degrees using a protractor; sketch angles of specified measure.
3.MD.D.8Solve real-world and mathematical problems involving perimeters of polygons, including finding an unknown side length.
5.OA.A.1Use parentheses, brackets, or braces in numerical expressions, and evaluate expressions with these symbols.
5.OA.A.2Write simple expressions that record calculations with numbers, and interpret numerical expressions without evaluating them.
4.NBT.A.2Read and write multi-digit whole numbers using base-ten numerals, number names, and expanded form; compare two multi-digit numbers using >, =, and < symbols.
5.NBT.B.6Find whole-number quotients of whole numbers with up to four-digit dividends and two-digit divisors, using strategies based on place value and the relationship between operations.
6.NS.B.2Fluently divide multi-digit numbers using the standard algorithm.
2.NBT.B.7Add and subtract within 1000, using concrete models or drawings and strategies based on place value.
4.MD.C.7Recognize angle measure as additive; solve addition and subtraction problems to find unknown angles on a diagram.
4.NBT.B.4Fluently add and subtract multi-digit whole numbers using the standard algorithm.
6.G.A.1Find the area of right triangles, other triangles, special quadrilaterals, and polygons by composing into rectangles or decomposing into triangles.
4.NF.C.7Compare two decimals to hundredths by reasoning about their size; record the results of comparisons with the symbols >, =, or <.
5.NBT.A.4Use place value understanding to round decimals to any place.
1.MD.B.3Tell and write time in hours and half-hours using analog and digital clocks.
2.MD.C.7Tell and write time from analog and digital clocks to the nearest five minutes, using a.m. and p.m.
3.OA.B.5Apply properties of operations as strategies to multiply and divide (commutative, associative, and distributive properties).
5.G.A.1Use a pair of perpendicular number lines (axes) to define a coordinate system; understand that the first number in an ordered pair indicates how far to travel along the x-axis.
5.G.A.2Represent real-world and mathematical problems by graphing points in the first quadrant of the coordinate plane, and interpret coordinate values in context.
3.NF.A.2Understand a fraction as a number on the number line; represent fractions on a number line diagram.
4.G.A.1Draw points, lines, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines; identify these in two-dimensional figures.
5.MD.C.3Recognize volume as an attribute of solid figures and understand concepts of volume measurement using unit cubes.
5.MD.C.5Relate volume to the operations of multiplication and addition and solve real-world and mathematical problems involving volume.
5.NBT.A.2Explain patterns in the number of zeros of the product when multiplying a number by powers of 10, and in the placement of the decimal point; denote powers of 10 with exponents.
3.NBT.A.1Use place value understanding to round whole numbers to the nearest 10 or 100.
6.EE.A.1Write and evaluate numerical expressions involving whole-number exponents.
4.MD.A.2Use the four operations to solve word problems involving distances, intervals of time, liquid volumes, masses of objects, and money.
4.NBT.A.1Recognize that in a multi-digit whole number, a digit in one place represents ten times what it represents in the place to its right.
4.NBT.A.3Use place value understanding to round multi-digit whole numbers to any place.
2.MD.A.1Measure the length of an object by selecting and using appropriate tools such as rulers, yardsticks, meter sticks, and measuring tapes.
3.MD.B.4Generate measurement data by measuring lengths using rulers marked with halves and fourths of an inch; show the data by making a line plot.
4.OA.C.5Generate a number or shape pattern that follows a given rule; identify apparent features of the pattern that were not explicit in the rule itself.
5.OA.B.3Generate two numerical patterns using two given rules; identify apparent relationships between corresponding terms and graph the ordered pairs.
2.MD.C.8Solve word problems involving dollar bills, quarters, dimes, nickels, and pennies, using $ and ¢ symbols appropriately.
4.G.A.3Recognize a line of symmetry for a two-dimensional figure; identify line-symmetric figures and draw lines of symmetry.
4.MD.B.4Make a line plot to display a data set of measurements in fractions of a unit (1/2, 1/4, 1/8); solve problems involving addition and subtraction of fractions using the data.
4.NF.B.4Apply and extend previous understandings of multiplication to multiply a fraction by a whole number.
5.NF.B.5Interpret multiplication as scaling (resizing) by comparing the size of a product to the size of one factor.
5.NBT.A.1Recognize that in a multi-digit number, a digit in one place represents 10 times as much as it represents in the place to its right and 1/10 of what it represents in the place to its left.
5.NF.B.3Interpret a fraction as division of the numerator by the denominator; solve word problems involving division of whole numbers leading to fraction or mixed-number answers.