Roofing Estimator
Roofing Estimator
Use a roofing estimator to find information to calculate the amount of roofing supplies to order.
- Pen and paper and/or digital device
- Calculator (optional)


A2. Interpret documents
Competency A: Find and Use Information
Task Group A2: Interpret documents
Level: 3
At this level, learners:
Interpret somewhat complex documents to connect, evaluate, and integrate information
Performance Descriptors
The learner:
- Performs complex searches using multiple search criteria
- Manages unfamiliar elements (e.g. vocabulary, context, topic) to complete tasks
- Integrates several pieces of information from documents
- Compares or contrasts information between two or more documents
- Uses layout to locate information
- Identifies the purpose and relevance of documents
- Begins to recognize bias in displays, such as graphs
- Makes inferences and draws conclusions from information displays
- Identifies sources, evaluates and integrates information
Task Descriptors
- Scope of task may not be clearly defined
- May involve more than one document
- Uses a somewhat complex format
- Displays many categories of information
- Contains sub-headings or subparts
- Can vary in length
- May include unfamiliar elements (e.g. vocabulary, context, topic)
- May contain specialized vocabulary
- Documents at this level may contain a paragraph or more of text
Examples:
- Forms
- Tables
- Timelines
- Graphs
- Maps
- Flow charts
ESKARGO:
Embedded Skills, Knowledge and Attitudes Reference Guide for Ontario – A2.3
C3. Use measures
Competency C: Understand and Use Numbers
Task Group C3: Use measures
Level: 3
At this level, learners: Use measures to make multi-step calculations; use specialized measuring tools
Performance Descriptors
The learner:
- Calculates using numbers expressed as whole numbers, fractions, decimals, percentages, and integers
- Calculates the radius, diameter, and circumference of circles
- Understands and uses properties of angles and triangles to solve problems
- Understands and uses formulas for finding the perimeter, area, and volume of non-rectangular, composite shapes
- Manages unfamiliar elements (e.g. context, content) to complete tasks
- Makes estimates involving many factors where precision is required
- Interprets and represents measurements taken with specialized tools (e.g. callipers, multimeters)
- Chooses and performs required operations; makes inferences to identify required operations
- Selects appropriate steps to solutions from among options
- Identifies a variety of ways to complete tasks
- Interprets, represents, and converts measures using whole numbers, decimals, percentages, ratios, and fractions
- Organizes and displays numerical information (e.g. graphs, tables)
- Uses strategies to check accuracy (e.g. estimating, using a calculator, repeating a calculation, using the reverse operation)
Task Descriptors
- Scope of task may not be clearly defined
- May include unfamiliar elements (e.g. context, content)
- Requires multi-step calculations where one step builds on the previous step
- Requires the use of rates or common formulas or both
- May require converting measurements to make calculations
- May involve documents (e.g. rate tables, scale drawings)
- May require converting between whole numbers, decimals, fractions, ratios, and percentages
- May require converting between measurement systems or between units in one system
ESKARGO:
Embedded Skills, Knowledge and Attitudes Reference Guide for Ontario – C3.3