I need directions on paris metro to euro disney from the charles degaule airport?

You have to take Line B of the Metro from Charles de Gaulle Airport station to Chatelet-Les Halles station, then change to Line A from Chatelet-Les Halles station to Marne-la-Vallee Chessy station. The first trip takes about 36 mins and the second trip takes about 40 mins. But there's a shorter trip by tram by taking Tram number 231-003 from Terminal 1 to Cheyenne. This trip takes about one hour and five minutes.

look at the metro map and it should be able to help u.

My main advice about the metro is ALWAYS to know your DIRECTION and not only the lines and where you want to stop.
If you stick to this rule, you'll never be lost! ;)

As far as you're concerned, you need to take the:
1- RER B, direction Saint R茅my les chevreuses/Robinson and stop in Ch芒telet les Halles.
And then:
2- RER A, direction Marne la Vall茅e-Chessy, and Eurodisney's the final stop.

Enjoy yourself with Mickey!!