Jaaxy is one way but there are certainly other tools and free methods as well.

There's free websites you can use like, http://whatpageofsearchamion.com/ (I'm sure there are others too)

If you are using chrome, a really neat free tool you can install is the SEO SERP Workbench extention. https://chrome.google.com/webstore/detail/seo-serp-workbench/ehbgolklgacemnfnmkkpgekngaaggjjl/related

You can also check it manually with an ingognito window (chrome) or private brower (firefox, etc)

I hope that I understand your question correctly. I'm sure that there are many methods to check your page rank for keywords. The method that I know best:
- Jaaxy.
With a paid Jaaxy account (not sure if it is available on the free one), under the "Search" section there is a submenu that has the option "site rank" (just to the right of "Keyword Data").
- Once you click on site rank, you can search a specific keyword for a specific site (i.e. a keyword that you targeted for your site) and it will bring up the result for you.

** Checking this can be addicting - I've had the pleasure of watching the rankings for several keywords on my site gradually increase from pages 10+ to the top 3 pages! Its just proof that the strategies, lessons, guides, and all the awesome WA members' help works :)