Simple past or past simple?

Hi everybody,

I'm a teacher of English at a German Grammar School and after 12 years of experience I'm still wondering about the following puzzle:
Why do all the Grammar books stick to the "confusing" expressions simple past and simple present, although it seems quite more logical to say past simple and present simple? I really prefer these expressions in my classes, because all the other tenses just start with the "tense marker" and go on with the "aspect marker": present progressive, present perfect, past progressive, past perfect.
Can I go on using my preferable expressions?

Yours, D.S. Elfers