Sum of angles of a quadrilateral

Pegboard - for Geometry

a/Sin A = b/Sin B = c/Sin C = 2R

Distance of a point from a plane

Lepto, Messo, Platic & Kurtic

Normal Probability Curve

Geometric Meaning of ?a (b? x ?c)

Geometric Meaning of ?a x b?

Geometric Meaning of ?a - b?

Three Dimensional Geometry

Probability

Construction of Parabola

Maximum & Minimum

Lagrange's Mean Value Theorem

Discontinuity of Functions

Defects in Inductive Methods

Tangent at a Point

Length of a Tangent

May I say your age?

Construction of Ellipse

Change of Axis

Trigonometric Ratios (Circular)

Sum of Reciprocal of two Numbers / Harmonic Mean

Sine & Cosine Machine

Secant Machine

Cosecant Machine

Konigsberg Bridge problem

De-Morgan's Law

Two Dimensional Geometry

Tangent Machine

Geometric Multiplication / Geometric Division

Graph Board

Geometric Mean < Arithmetic Mean

Trisection of angles Tomahawk

Solutions of Linear Equations

Shapes and Figures 2D and 3D

Areas of triangles with a point inside the triangle

Intercepts of Equidistant Parallel Lines - Divide a line segment to specific no. of equal parts

Sum of first n Natural Numbers

Radius of Earth

Factorization of Polynomials

Fibonacci Series

Properties of Tangents & Secants

Parabola for GM and Square Root

Square Root of a Number

Combinations of models of 2D

Why They are not Congruent

Sum of first n Odd Numbers

Pascal's Triangles

Trigonometric Ratios (< 90)

Theorems in Circle

Solution of Quadratic Equations

Clinometer

Construction of Triangle with equal area of a quadrilateral

Midpoint Theorem

Thales Theorem

64 = 65 Puzzle

40 Bottles - 41 Bottles

Dissection of Square - Puzzle

Solids by Paper Folding

Solid (Euler's Formula)

Net of Square Pyramid

Net of Solids

Sum of Interior Angles of a Polygon

Sum of angles of Polygons (Method II)

Sum of angles of Polygons (Method I)

Cyclic Quadrilateral

Tangent Segment Theorem

Properties of a Chord of a Circle

Frustum of a Square Pyramid

Section of a Triangular Prism

Section of a Square Prism

Volume of a Triangular Prism

Volume of a Rectangular Prism

Volume of a Cylinder

Volume of a Sphere

Volume of a Hemisphere

Volume of a Cone

TSA of a Cuboid

Surface Area of a Cylinder

Surface Area of Octagonal Prism

Surface Area of Hexagonal Prism

Surface Area of Pentagonal Prism

Surface Area of a Square Prism

Surface area of a Rectangle Prism

Surface area of a square Pyramid

Surface area of a cube

Surface area of a Sphere

Surface Area of a Cone

Square Area 1/2 - 1/2

Relation connecting the area of similar triangles

Area of triangles between parallel lines

Area of quadrilateral with same base and height

Area of triangle with same base and height

Area of Sector

Area of Quadrilateral

Area of Kite

Area of Rhombus

Area of a Trapezium

Area of a triangle

Area of Annular Ring

Area of a Circle

Concurrent lines in a triangle - Centroid

Concurrent lines in a triangle - In Centre

Concurrent lines in a triangle - Circum Centre

Concurrent lines in a triangle - Ortho Centre

Congruency of triangles (RHS)

Congruency of triangles (ASA)

Congruency of triangles (SAS)

Congruency of triangles (SSS)

Similarity of triangle (AAA)

Algebraic Identity (a + b + c)3

Algebraic Identity a3 - b3

Algebraic Identity a3 + b3

Algebraic Identity (a - b)3

Algebraic Identity (a +b)3

Algebraic Identity (a + b + c)2

Algebraic Identity a2 - b2 = (a + b) (a - b)

Algebraic Identity (a+ b)2 = a2 +2ab + b2

Algebraic Identity (x + a) (x + b)

Algebraic Identity a(b +c) = ab + ac

Square to rectangle paradox

Figures obtained by joining midpoints of a quadrilateral

Kaleidoscope

Activities in paper folding (Polygon)

Set Theory - (Intersection, Compliment etc.)

Railway Track Puzzle

Activities in paper folding (Angles)

Graph Board - Axis Game

Pyramidal Numbers - Square

Triangular Numbers, Square Numbers

Pentagonal Numbers & Hexagonal Numbers

Pentominoes - Puzzle

Proof of Pythagoras Theorem II

Proof of Pythagoras Theorem I

Properties of Parallellogram

Triangle Puzzle

T Puzzle

Number Puzzle

Operations of Decimal Numbers

Angles Around a Point

Quadrilaterals

Nohmogram

Verification of Pythagoras Theorem

Linear Pairs

Parallel Ruler

Parallel lines intersected by a transversal

Construction of Triangles - Basic concept (Triangular Inequality)

Exterior Angles of a Triangle

Types of Triangles by sides and angles

Concept of Volume

Magic Square (Prime Numbers)

Factor Game

Mathematical Operations of positive and negative numbers

Properties of Addition & Multiplication

Geo Board - Circular

Numerals Through Angles

Similarity & Congruence

Measuring Jars

Weight Puzzle

Metric Systems

Horse Puzzle

Prime Numbers - Eratosthenes

Triangle Puzzle Numbers

Magic Square 5 x 5

Magic Square 4 x 4

Magic Square 3 x 3

Pallankuzhy

Magic Stars

Number Chain - Division

Multiplication Table

Number Chain - Multiplication

Number chain - Subtraction

Number Chain - Addition

Abacus Subacus

Abacus Chinese

Abacus - II

Addition Number Net

Patterns - Number

Patterns - Pictures

Number stars

Step Up/Step Down

Greater or Less

Concept of Number

Matching

Concept of Grouping

Octants

Functions InTo

Function OnTo

Functions One - One

Functions Many One

Rotation of Axes

Translation of Axes

Directions - Cosines

Conical Sections

Linear Combination of Vectors

Frustum of a cone

Concept of Pi

Volume of a Cuboid

Golden Ratio

Sum of exterior angles of a polygon

Sum of Arithmetic Progression

Surface Area of a Hemisphere

Irrational Numbers

Algebraic Identity (a-b)2

Area of a Parallelogram

Tangram - 7 pieces

Pyramidal Numbers - Triangles

Sum of angles of a triangle

Regular and Irregular figures

Soma Cube Puzzle

Proof of pythagorus theorem - 3

Concept of Area

HCF- Using Number Plates

LCM- Using Number Plates

Fractional Kit

Geo Board - Square

Tangram- 5 pieces

Fractions- Half & Quarter

Abacus- Vertical

Roman Number Kit

Concept of Division

Multiplication of 9

Multiplication ring

Number Chain

Multiplication using Sticks

H & T game

Placement of Numbers

Napier Sticks for multiplication

Dummy Currency Notes

Base value & Place value

Number Pocket

Addition Made easy

Abacus-Manichattam

Guess & Count

NUMBER STRING

CERT Educational Research & Training

CERT Educational Research & Training (CERT) Private Limited, Thiruvananthapuram, Kerala, India is incorporated ⁄ constituted with the societal
commitment to develop and implement quality innovations in the field of education through extensive research and development.

Education has always undergone evolution and fine tuning based on the requirements of each nation from time immemorial. Such changes can be in the content, mode of instruction and or the learning supplement used. In line with the same, National Policy on Education (1986) of India and National Curriculum frame work (2005), India has emphasized the need for a more process and activity oriented pedagogy in mathematics termed as Mathematics laboratory in schools to improve the scholastic performance of students in maths and also to eradicate the maths phobia among students. In spite of such efforts, maths lab still tends to remain more or less a concept rather than a grass root level reality.

It is in this context that, the requirement of an organization to render quality innovations in the field of education, especially Maths, Science and English, was felt and CERT Educational Research & Training (CERT) was constituted. Although CERT aims at improving the teaching and learning of all subjects from preschool to higher secondary, through a wide range of programs and activity-oriented learning processes, the present thrust would be on mathematics especially on mathematics laboratory in an effort to provide concrete learning activities/processes for the study of this abstract subject.

Education has always undergone evolution and fine tuning based on the requirements of each nation from time immemorial. Such changes can be in the content, mode of instruction and or the learning supplement used. In line with the same, National Policy on Education (1986) of India and National Curriculum frame work (2005), India has emphasized the need for a more process and activity oriented pedagogy in mathematics termed as Mathematics laboratory in schools to improve the scholastic performance of students in maths and also to eradicate the maths phobia among students. In spite of such efforts, maths lab still tends to remain more or less a concept rather than a grass root level reality.

It is in this context that, the requirement of an organization to render quality innovations in the field of education, especially Maths, Science and English, was felt and CERT Educational Research & Training (CERT) was constituted. Although CERT aims at improving the teaching and learning of all subjects from preschool to higher secondary, through a wide range of programs and activity-oriented learning processes, the present thrust would be on mathematics especially on mathematics laboratory in an effort to provide concrete learning activities/processes for the study of this abstract subject.

DIRECTORS’ MESSAGE

"
CERT Educational Research & Training Pvt Ltd is a company dealing with educational projects mainly in the area of Science, Maths and Language.

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