Keystone Education (formerly ACI Diamond Bar) - Diamond Bar, California

George Z.

Keystone is such an amazing place to learn and grow as a person. The directors, teachers, and everyone involved helped me learn for nearly a decade, and I am so grateful to them for everything they've done. A few years ago, I even turned to Keystone for assistance with applying to colleges. My counselor, Gene, helped me assemble my portfolio (which was boosted thanks to years of Keystone's academic preparation), perfect my essays, and put my best foot forward. I'm now in the college of my dreams, and I couldn't be more appreciative.

My advice to parents interested in Keystone: start when you can! There are programs available for kids as young as early elementary age, where they learn phonics, grammar, and reading/writing with skilled teachers. However, Keystone more than welcomes kids of all ages, and offers dedicated SAT and ACT Prep for those interested, as well as private college application sessions. It's always a great time to start learning with Keystone, and I'm very glad I did.

Kyle Lin

Keystone is amazing. I have practically been raised by Keystone, formerly known as ACI, as I have been enrolled for my whole life! Not only did Keystone help me immensely for preparing for my SAT through their SAT course, but their college counseling have actually helped me get into New York University. Keystone not only produces results, but they really care about their students as well. Every teacher is open to talk to their students and provide emotional support. Overall, I just want to say thank you to Keystone for being such a large part of my life!

John Au-Yeung

I am the parent of two children who has been attending Keystone for close to two years- both physically at Keystone and on-line teaching. I am absolutely very happy with the school and with my children's academic progress. The teaching staff is very professional and is truly helpful to the children. The admin staff bends over backwards to be accommodating and helpful as well. The school provides an excellent safe and quiet platform for the children to learn. We truly appreciate Keystone's guidance in helping our children grow academically.

Bruce Brown

Both my kids went to Keystone Education (started when it was ACI) and both benefited greatly. Keystone Education is well organized and efficiently run, with a very clear goal, help their students get admitted into top schools. Not only do they help kids learn the material and score well on exams; but they are very friendly and helpful, and provide excellent advice about the application process.

Lawrence Mao

Great environment to learn filled with wonderful and kind staff that care about your growth. They provide all the resources you need to succeed as long as you put in work from your own end.

caitlyn

This place is an absolute waste of time and money. They don't correctly grade the childrens essays and the Vocab and Grammar quizes are so bad. I hate how this place gives homework and doesn't correct what so ever. They shouldn't even be giving away homework. Second of all, Highschool and middles school children have a lot of homework in school and this place desides to stack them up with twice as much that is useless. I hate this place and they have brainwashed my children

nicholas hui

This place is great!!! They actually teach you things here, not like other places. It is pretty pricey though.

hi there

There is a little too much homework but it helps us keep learning.