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Mathematics
Projections: Plans and Elevations in Maths
This video explains how to draw 2D projections of 3D shapes: plans, front elevations and side elevations. Practice questions are at the end of the video.
Scatter Graphs: What are they and how to plot them
This video explains what a scatter graph/plot is and how to plot them. A practice question is provided at the end of the video.
Skip to:
00:00 Introduction
00:18 What is a scatter graph/scatter plot?
00:40 How to plot a scatter graph
01:41 Scatter graphs: practice question
Lowest Common Multiple
This video explains how to find the lowest common multiple of two or more numbers, using two methods: listing the multiples and using prime factorisation. Practice questions and answers are at the end of the video.
For a refresher on multiples: https://youtu.be/pEy8QKEBL_M
For a refresher on prime factors: https://youtu.be/Bphq-n84ouM
Skip to:
00:00 Intro
00:27 What does lowest common multiple mean
01:00 Method 1: Listing the multiples
01:29 Method 2: Using prime factorisation
01:54 Example
02:13 Practice questions and answers
Types of Angles
In this video we explain the different types of angles in maths. We explain acute angles, right angles, straight angles, obtuse angles, reflex angles and full rotations. Two sets of practice questions and answers are at the end of the video so you can test your knowledge.
Skip to:
00:00 Introduction
00:21 What are angles and what symbols are used?
01:01 Actue angles
01:30 Right angles
01:42 Obtuse angles
01:52 Straight angles
02:02 Reflex angles
02:14 Full rotation
02:24 Practice questions set 1
02:50 Practice questions set 2
What Is A Reciprocal Of A Number
In this video we explain what a reciprocal of a number is and what a reciprocal of a reciprocal is. Practice questions and answers at the end of the video.
Skip to:
00:00 Introduction
00:20What is a reciprocal of a number?
01:10 Reciprocal of the number 3 example
01:54 More reciprocal examples - do you notice a pattern?
02:28 Reciprocal of a number: definition
02:36 What is the reciprocal of a quarter?
03:02 Practice questions and answers
Decimal Place Value
This video will explain what decimal place value is and the different place value headings for decimal numbers, from thousands to thousandths. Practice questions and answers are at the end of the video.
For an introduction on place value, check out our video What Is Place Value: https://youtu.be/BL6pGhnBdj8
Skip to:
00:00 Introduction
00:20 Place value recap
00:50 Decimal place value headings
02:00 Decimal place value chart/grid
02:58 Place value practice questions
Nets Of 3D Shapes: GCSE exam style questions
This video provides some typical GCSE exam style practice questions on the topic of nets of 3D shapes. We also explain how the marks are awarded for each question.
For a recap on nets of 3D shapes see our video: https://youtu.be/s7GrS0b3FRw
For a recap on compound shapes: https://youtu.be/U25OYoLYtVM
Skip to:
00:00 Introduction
00:25 GCSE style question one
01:56 GCSE style question two
03:15 GCSE style question three
More Pentominoes Puzzles
More Pentominoes Puzzles! This video follows on from our previous video and provides four advanced pentominoes puzzles and solutions.
A great activity to develop your problem solving skills!
Check out our introduction to pentominoes video: https://youtu.be/9NnVtP6GAiI
To complete the puzzles either use squared paper and colouring pencils or use this virtual manipulative: https://mathsbot.com/manipulatives/pentominoes
Skip to:
00:00 Introduction
00:23 Example pentominoes puzzle
00:57 Pentominoes puzzle 1: 8 x 8 grid
01:23 Pentominoes puzzle 2: 9 x 9 grid
01:48 Pentominoes puzzle 3: 8 x 8 grid
02:12 Pentominoes puzzle 4: 3 x 15 grid
Video: What Is Place Value
This video will explain what place value is and the different place value headings from units to thousands. Practice questions and answers are at the end of the video. (Decimals and beyond thousands will be explained in another video).
Algebra Substitution Exam Style Questions
This video walks you through some GCSE exam style practice questions on the topic of substitution in maths.
Algebra: Substitution in Maths
This video explains substitution in maths within the topic of algebra and what it means to evaluate an expression. Practice questions are at the end of the video.
Symbols Used In Mathematics
This video explains some of the most common symbols used in mathematics, their names and their meanings.
Keywords in Algebra
This video goes through some important mathematical keywords in algebra. A matching activity is at the end of the video.
How To Find The Circumference Of A Circle: Using The Diameter Or Radius
This updated video will explain how to find the circumference of a circle when given either the diameter or the radius. We also explain you how the formula is actually derived. Have a go at the practice questions at the end of the video.
Fraction Walls: Fractions, Decimals and Percentages
This video explores the fraction wall; a visual representation of fractions. We look at three fraction walls for: fractions, decimals and percentages.
How To Find The Area Of A Triangle
This video explains how to find the area of a triangle when we are given the lengths of the base and vertical height. We also explain why the formula works. Practice questions and answers are at the end of the video.
Keywords In Statistics
This video explains definitions for some common keywords used in statistics. Practice questions and answers are at the end of the video.
Quadratic Equations: Introduction / Rearranging To Standard Form
This video provides an introduction to quadratic equations; how to identify quadratic equations, how to rearrange them into the standard form, and how to identify the specific terms. A range of practice questions are at the end of the video.
The Quadratic Formula Explained
This video explains how to solve a quadratic equation using the quadratic formula. We also explain what the discriminant is. Practice questions are at the end of the video.
Algebra Basics: Introduction to conventions and sign rules
This video is an updated introduction lesson to the basic concepts you need to learn for algebra covering the basic conventions as well as the sign rules. Practice questions and answers at the end of the video.