Times tables starts by teaching counting at intervals usually by 2s, 5s and tens and these are the first tables taught.
Usually you then launch into families - so x2, x4 and x8 (which effectively is doubling, doubling again and doubling a 3rd time).
Next is 3, 6 and 9.
x1 seemed to have been skipped over at school - but anything x1 is itself - and this can be nicely recapped when teaching x11.
x7 - it's the tricky one. Just practice - but remember that with all the other work you've done you've learned x7 (with x1, x2, x3, x4, x5, x6, x8, x9, x10 and x11).
That just leaves x12 - if you're a completest.
x13 is of course just showing off.
Times tables games:
Mumsnet has a link to Math Champs which has good practice with addition/ subtraction/ multiplication as video games here: www.mathschamps.co.uk/ It's still in development [or BETA] so sometimes it crashes - but it's good fun and not too stressful.
Mumsnet has a timestable grid game for practice here: www.mumsnet.com/learning/maths/interactive-times-tables-activity.
Woodland Junior School's Mathszone has all sorts of support for learning timestables here: www.woodlands-junior.kent.sch.uk/maths/timestable/index.html.
Crickweb has timestables practice here as well: www.crickweb.co.uk/ks2numeracy-multiplication.html
Ambelside primary have this lovely calm practice called Table Trees: www.amblesideprimary.com/ambleweb/mentalmaths/tabletrees.html
If you need a bit more thrill and adventure - you can download Timez Attack from here www.bigbrainz.com/ - there's a free version with a prison/ castle platform or you can pay for more worlds to explore. Basically you're a little boy or girl ogre and you run about solving multiplication problems. The nice thing about this game is that it does stop to show that multiplication is multiple additions of the same number so 5 x 3 = 3+3+3+3+3 - in the game you throw balls against the wall and they appear as dots (like a die) and a voice counts up each time. Then you get the verticle multiplication problem and type in the answer. Then a big ogre comes out and asks you 3 multiplication problems over and over in different order and if you answer quickly you kill him off and can move on to the next problem.
HTH