Types, Parts and Uses of Sewing Machines for JSS 1
Sewing machines join fabrics with stitches. Hand-operated, treadle and electric machines differ in power source, speed and the settings they require.
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Parts of a Sewing Machine and Their Functions for JSS 1
The needle carries thread through fabric, feed dogs move the cloth and the presser foot holds it in place. Correct threading supports even…
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Safe Handling, Maintenance and Storage of Sewing Tools and Equipment for JSS 1
Store sharp sewing tools securely and switch off machines before cleaning or changing needles. Regular dust removal and proper oiling protect equipment.
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Basic Sewing Techniques and Their Uses for JSS 1
Running stitches are useful for temporary seams, while backstitches provide stronger joins. Neat seam allowances help garment pieces fit together correctly.
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Types, Properties and Uses of Fibres and Fabrics for JSS 1
Cotton and wool are natural fibres, while polyester is manufactured. Fabric texture, strength and absorbency influence the garments each material suits.
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Properties and Volumes of Three-Dimensional Figures for JSS 1
Three-dimensional solids have length, width and height. A cuboid's volume is length × width × height; a cube's volume is side × side…
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Construction of Parallel Lines, Perpendicular Lines and Special Angles for JSS 1
A ruler, compass and set square help construct parallel and perpendicular lines. Compass arcs can also produce standard angles without guessing.
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Measuring and Identifying Types of Angles for JSS 1
Angles are measured in degrees with a protractor. Acute angles are below 90°, right angles equal 90°, and obtuse angles lie between 90°…
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Representing and Interpreting Data for JSS 1
Tables and charts turn collected numbers into patterns that can be compared. Read the labels and scale carefully before drawing conclusions from a…
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Subtraction of Binary Numbers for JSS 1
In binary subtraction, 1−0=1 and 1−1=0. If a column requires 0−1, borrow from the next higher place, which has a value of two.
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Multiplication of Binary Numbers for JSS 1
Binary multiplication uses just 0 and 1: multiplying by 0 gives 0, while multiplying by 1 copies the number. Add shifted partial products.
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Open Sentences, Symbols and Missing Values for JSS 1
An open sentence contains a missing value, often represented by a box or letter. Substituting the correct number makes its mathematical statement true.
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