For $3500. you should be able to get something in either the Cuesta Park neighborhood or Waverly Park neighborhood (west of El camino real). There is also possibilities to get a home in Mountian vVew with Los Altos schools (best in the state for K-8). If you would like, I can make an annoucement in our office meeting and network with a few other agents in town (next week) to see if there are any pocket rentals that are comming up taht might meet your needs.
Glen is correct that Craigslist.org is the best resource for finding a rental, especially a single-family home. Compared to your home in Denver, you should expect to find a house of around 1500 - 2000 sf, and a yard about 6000 sf in Mountain View. Your budget of $3500/month will get you a 3-4 bedroom, 2 bath home built in the 1950's on a 6000 foot lot. The best elementary schools in Mountain View are Bubb and Huff. These are both in the 94040 zip code on the south side of El Camino Real. All the elementary schools in Mountain View are good, with the exception of Castro.
A great resource for school information is: http://www.greatschools.net.
Please email or visit my website for more tools to help you with school information or rentals. I used to live in west Denver, and many of my clients are relocating from elsewhere.
Good luck with the home sale!