STEP II (2010) Question 4

proposed answer

p1
p2
p3
p4

A cute integral

geogebra file here

justification here

STEP 2010 MATHEMATICS 1 MECHANICS Q9

Proposed solution page1, page 2

THE ROLLING CIRCLE

Geogebra file 

S.T.E.P. 2015 SECTION B QUESTION 11

proposed solution here

STEP 2015 MATHEMATICS 1 SECTION A 4

Proposed solution here

Demonstrating the relation between the slope and the derivative function

https://www.geogebra.org/m/MC2nYSZj

CONCEPT BASED PROBLEM SOLVING

the whole article here

2015, STEP2,QUESTION 1

proposed solution here

STEP1 2007 QUESTION 4

proposed solution here

INTRODUCTION TO THE NATURAL LOGARITHMIC FUNCTION

http://ggbm.at/WHZ6crYy

Investigating the solution curve of an ordinary differential equation using the tangent field.

for various values of the parameters a and b. 

A snapshot of the corresponding geogebra file is the following:

You can download this file here.