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#### Codebreakers - Four Operations (in words)

A couple of codebreakers (in the format that seems very popular on TES) that I made for use with low ability yr 7 students built around completing simple arithmetic but with numbers presented as words instead of as numerals.
There are two codebreakers here - the second one is more difficult than the first.

#### Plot Co-ordinates Superhero Picture

Plot the given co-ordinates to form an image of Ironman.
I’ve provided the same worksheet with 3 alternatives - one that forms the image entirely in the first quadrant, one that forms the image across the first and second quadrants and one that forms the image across all four quadrants.
This should allow for mild differentiation of the same activity.

#### Dials - Algebraic Factors

Use the clues to set each dial to the correct answer. Often individual dials can be set to two or more possible settings but each group of three has only one correct “setting”.
This particular worksheet is focused on factors and multiples of algebraic terms (with a few “clues” related to prime numbers and some related to square numbers).
The general idea behind these number dials is to provide a light revision activity but they may be useful in other situations. In particular I want students to begin to think about how to recognise whether an algebraic term is a square number and to contemplate what a multiple of an algebraic term can look like.
Answers are provided in the powerpoint file (this is not animated).
This worksheet follows on from the related (non-algebraic) worksheet:
https://www.tes.com/teaching-resource/resource-12538605

#### Codebreakers - Nearly Numbers Addition

A couple of codebreakers in the popular format. Students should solve the basic arithmetic to decode the answer to a bad joke.
There are 2 codebreakers - both involve the addition/subtraction of “nearly numbers” (that should ideally be rounded to the nearest 10 or 100 first before attempting arithmetic). The first codebreaker is relatively simple, the second is a slight step up in difficulty.
Both codebreakers are designed to be used with low ability groups to facilitate an understanding of place value.

#### Codebreakers - Metric Length Addition & Subtraction

Codebreakers in the format popular on TES. These are focused on adding and subtracting lengths given in different units (e.g. mm + cm).
There are three codebreakers attached - each with a (bad) joke. They gradually become more difficult in various ways
Both codebreakers require students to convert units by multiplying/dividing by 10, 100 or 1000. The third is more challenging to decode (the units in the key for the first codebreaker are all in metres, this is not the case for the third).

#### Shade by Metric (distance) Addition

Add or subtract lengths (given in different metric units) and assess whether the answer lies within a given range. Shade those cells that lie within the range.
All worksheets require students to work with a combination of mm, cm and m but the booklet gradually increases in difficulty as students progress.

#### Shade by Time Later/Before

Each cell contains a description of a time (before or after a given time). If the time described fits within a given range then the cell should be shaded.
The booklet has 16 shade-by-time worksheets to complete - each one forms a simple pattern upon completion.
This is a good activity for students who need practice on the basics of arithmetic with time (which is a small but vital skill for both GCSE and Functional Skills).
The booklet gradually increases in difficulty in a number of ways as students progress through.

#### Codebreakers - Time After/Before

A couple of codebreakers in the popular format. Students should calculate the time described (always simple hours & minutes before/after a given time) to decode the answer to a bad joke.
There are 2 codebreakers - one that deals only in increments of 15 minutes and one that deals in increments of 5 minutes.
I had found plenty of other codebreakers on similar topics but not ones that did specifically what I wanted so hopefully these are of use.

#### Dials - Values of Digits - Integers

Use the clues to set each dial to the correct answer. Often individual dials can be set to two or more possible settings but each group of three has only one correct “setting”.
This particular worksheet is focused on understanding the value of digits and includes questions in which the numbers are stated in words.
Answers are provided in the powerpoint file (but this is not animated).

#### Dials - Equation of a Straight Line

Use the clues to set each dial to the correct answer. Often individual dials can be set to two or more possible settings but each group of three has only one correct “setting”.
This particular worksheet is focused on understanding the gradient and y-intercept of a straight line stated algebraically.
Some of the clues require a student to identify which of the lines stated pass through a given point but none of the equations stated ever requires a student to expand brackets or to re-arrange equations.
My general concept for these dials is to provide a light revision activity but they may be of use in other contexts too.
Answers are provided in the powerpoint file (but this is not animated).

#### Dials - Factors

Use the clues to set each dial to the correct answer. Often individual dials can be set to two or more possible settings but each group of three has only one correct “setting”*.
This particular worksheet is focused on factors (with a few “clues” that require a student to distinguish between factors and multiples and some clues related to prime numbers).
The general idea behind these number dials is to provide a light revision activity but they may be useful in other situations.
Answers are provided in the powerpoint file (but this is not animated).
*I’m aware that with at least one of the groups I have introduced multiple possible correct configurations.

#### Dials - Values of Digits - Decimals

Use the clues to set each dial to the correct answer. Often individual dials can be set to two or more possible settings but each group of three has only one correct “setting”.
This particular worksheet is focused on understanding the value of digits in decimal numbers.
Answers are provided in the powerpoint file (but this is not animated).

#### Shade by Directed Numbers

Shade (or don’t shade) the segments of the image based on whether the expression within evaluates to a positive or a negative number (directed number).
This resource also contains a second hidden hidden activity - shade the segments where the absolute value of the expression within is less than 20 to reveal a second (different) image).
Expressions are a mixture of addition, subtraction, multiplication and division.

#### Wipeout - Less than Zero

Based on the old BBC quiz (with Bob Monkhouse). There are some expressions on the board that may (or may not) evaluate to less than zero. The objective is for students to ‘bid’ on how many expressions they can see that are definitely BELOW zero.
This activity is intended for use as a plenary - it relies on knowledge of the four operations in combination with directed numbers.

#### Shade by Equivalent Fractions Booklet

A 36 page booklet filled with equivalent fractions shading problems. Simply shade the cells that contain a fraction equivalent to the one listed at the top of the page to reveal an image.
There is a gradual increase in difficulty as the book progresses - all earlier pages require students to find equivalent fractions to simple unit fractions.

#### Codebreaker - Prime Factorisation

A codebreaker in the popular format. Students should convert numbers into prime factor index form to decode the answer to a bad joke (I no longer hate facial hair because it grew on me).
I had found plenty of other codebreakers on similar topics but not one specifically on prime factorisation so hopefully this is of use.

#### Rounding - Magic Squares

A couple of special “magic squares”* that are magic if - and ONLY if - all numbers within are rounded to one particular degree of accuracy.
Round the numbers to 1 d.p. and the square is NOT magic, round to 6 d.p. and the square is NOT magic - but round them to a particular accuracy and you will suddenly get a magic square.
*all rows and columns sum to the same value - but NOT diagonals

#### Codebreaker - Ordering Directed Numbers

A codebreaker in the popular format based around ordering positive and negative numbers (directed numbers). Answering the questions and decoding provides the punchline to a bad joke (it was a freebie).
I’ve found plenty of other codebreakers online for directed numbers but none specifically on the foundational skill of ordering them so hopefully this is of use to someone out there.
There’s plenty of discerning understanding of place value (including decimals) with directed numbers and one question that involves fractions.

#### Collecting Like Terms - Algebra-search

A “wordsearch” that operates by collecting like terms. A series of expressions are given and the students must find a line (horizontal, vertical or diagonal) that simplifies to that expression when like terms are collected.
The resource includes a series of progressively more difficult grids to figure out.

#### Codebreaker - Reverse Compound Growth & Decay

A codebreaker in the popular format. Students should reverse the compound interest (repeated percentage growth) or compound decay (repeated percentage decay) and use the answer to decode a joke.
As always, I only create codebreakers when I can’t find one that does exactly the same thing so hopefully someone else out there was looking for one that does what I’ve made this one for.