Education or Transportation?

Why not both? Be careful though, have your citizens complained about needing health yet? At level 16 you're going to start needing to start covering for health, which isn't cheap. The base clinic is $12.3K and the largest hospital is $64.2.

I got there and i didnt bought them, i saved the money becuase in the next level you will need a police department

Education and Transportation are not things that will cause your building to be abandoned without them. I'd stave off spending $40,000 on those until you've past level 16 and unlocked the hospitals. Once your infrastructure is covered no matter what level you get to, then start with Education and Transportation.

The schools and transportation hubs seem like a nice alternative to spending loads of $$$ on parks.

Interesting point. So far I have a lot of parks and no education or transportation. But I have 10 keys to spend. But trying to deal with the cost of services, and new commercial buildings to buy, I havent had 40K in quite a while...

I am camping @ level 13(2 exp away from 14), I have both built. I have been camped at this level for almost a week now. Between parks, transport, and edu I sit at 58k pop with 99% approval rating which nets me 10k+ per 24 hours.  Add in selling items other than expansion items I get another 5-10k per day. Just be patient and camp them simolians.

I'm camping a bit too… I'm very close to hitting level 12 and I assume that will unleash some havoc reltated to needing police stations. 

So, I'm going to keep building my coin up too 45K with a opulation of 51,000+. 

I have already invested in education; dept of ed, and grade school. As well as dept of transportation and one bus stop.

My frustration here is that I'm still getting some bubbles with sims saying they cant kids to schools.

Any strategy suggestions?

But which one is better? Looks to me like Transportation is better as the buildings are not dependent on one another like in Education and they cover more area.

Going to bite the bullit and build a second bus station to help spread out my city a bit.

Check the Specialization area of the guide below:

http://answers.ea.com/t5/SimCity-BuildIt-General/SimCity-BuildIt-Tip-and-Tricks-Guide-WIP/m-p/4195403#U4195403

transportation is better then education IMO. They are better and smaller buildings and you can have heliport as first building. No need to go through the chain of lower (and rather large) buildings.