The study aimed to: 1) create the valid mathematics learning media assisted
lectora inspire application on the material of probability, 2) find out and describe
teachers' and students' response to the media. The study used modified 4D
development model with three steps namely define, design, and develop. The trial
was conducted in SMP Diponegoro 1 Purwokerto with 10 students of class VIII B
as the research subject. The result showed that the developed learning media has
been valid with the mean score from validator of 4.2. The mean score of teachers'
response was 4.6. It means that the media is very helpful. The percentage of
students' response was 86%. It means that the media is very helpful in students'
learning process.