Since some other people have started making other lessons or teachings in Japanese, I guess I'll continue with numbers.... sweatdrop

11 - jyu ichi
12 - jyu ni
13 - jyu yon
14 - jyu shi
15 - jyu go
16 - jyu roku
17 - jyu nana
18 - jyu hachi
19 - jyu kyu
20 - ni jyu

TIP: Notice that after jyu (ten), gets repeated but with all the other numbers with it. That should give you a tip!

If you need tutoring on learning Japanese, I'd be glad to help! just PM me or post in the thread and i'd be glad to help!