Maths on speed

The first time i was introduced to speed, i was like ' so hard!!!' I find it very confusing and hard. I keep on getting wrong!!! After the hands on activities and the models taught by Mrs. Chien, i find it kind of simple. (for those question like two cars driving at opposite directions and how far apart is the towns.) so i tried the same method on other questions and suddenly, the questions seems to be easy all of the sudden. I understand my workings by listing which is the distance and others. the most helpful thing is a diagram i got it from a book.it helped me a lot!!! i start to like maths all of the sudden!!!
Distance- Speed x Time
Speed- Distance / Time
Time- Distance / Speed