Hey,
I had a friend who was in a similar predicament to you. You could do a Diploma of Engineering:
http://www.mibt.vic.edu.au/courses/bachelor-engineering-deakinhttp://www.monash.edu.au/study/coursefinder/course/2612/?courseview=domesticI'm not too sure how to enroll in either diploma, especially at Monash, but I do know that the MIBT Engineering Diploma is essentially a pathway into 2nd Year Engineering. It does sound enticing but remember that it costs $20,000 for just the one year, which, I think but I'm not sure, goes onto HECs but still, it is definitely a lot more compared to getting in 'directly', which is just roughly $8,000. (It's just something to note)
I echo what IT_Failure said. That is, try and enroll into Math Methods, it will undoubtedly be better for you as even if you don't meet the minimum pre-requisite of 20, or 25, for Math Methods, then at least you have the MIBT option as a back up plan.
If you wanted to know when is the latest to officially enrol in a VCE subject, then check out this document:
http://www.vcaa.vic.edu.au/Documents/handbook/2014/Important_Administrative_Dates_2014.pdf'Monday 24 February
ENROLMENT 1
Schools are required to finalise the following data by
this date:
• VCE Units 1 to 4
• VCAL Certificates and VCAL units
• VET Certificates and units of competence/modules
• Registration of IB students (Year 11 and 12). '
(If you want an anecdote, I enrolled into Chemistry a little over 1 and a half weeks into the semester. I had told my school that it was a pre-requisite for a course I wanted to do, so your school should be more than understanding in your circumstances as well)
Good luck!
EDIT: I should say that I don't even know if that is the 'official' date for schools to finalise enrollment data, it was something that I thought sounded 'about right'. So, don't quote me on the date.