Challenger School - Sunnyvale

Reviews

• SM

  Sunitha Moorthy

  Aug 14, 2026
  5.0
  Our daughter started preschool at Challenger Sunnyvale in 2023 and will be entering first grade this year. Our experience over the years has been amazing. Challenger makes learning fun/exciting through their superior curriculum, skilled teachers, and unique teaching methods. As parents, we feel a great sense of satisfaction in seeing our daughter receive quality education and grow into a responsible, confident individual who is genuinely thrilled to go to school every single morning and is so happy to share everything she learned when she returns home. She loves and looks forward to the annual Christmas Sing and Spring programs that showcases their musical talents, teamwork and courage to perform in front of parents/large audiences. Apart from academics, the school also provides wonderful opportunities through events such as Spelling- Bee, Young Author, Science Fair and Speech Festivals which encourage students to explore their interests, think creatively, build confidence, and develop important communication and presentation skills. We truly appreciate how the school focuses on the overall growth of each child and provides experiences that help them learn, discover their strengths, and grow beyond the classroom. Above all, what speaks volumes about how much my daughter loves her school is that she can’t wait for summer break to end so she can return to school. We would like to thank Ms. Saravanan for her patience and encouragement in Kindergarten, which instilled a true love for learning in our daughter. We would also like to appreciate the Director Ms. Denise, and Principal Mr. Krimmel for their incredible dedication in creating a safe, nurturing, and positive environment for the well-being of every student. The office and administrative staff are welcoming, proactive and always helpful. We highly recommend Challenger school to parents who are looking for a school with high standards, being true to their mission statement, delivers a safe environment and successful academic future.
• KC

  Ken Chen

  Jul 23, 2026
  5.0
  Challenger Sunnyvale is an excellent school and I highly recommend it. Challenger is well known for its rigorous academic curriculum but what has impressed us most is how personally invested the teachers are in helping every child succeed. The teachers take great pride in helping students reach Challenger’s high standards while remaining kind, patient, and supportive. We are particularly grateful to Mr. Wellersdick, the head of the elementary division. My son is very active and Mr. Wellersdick took a great deal of time to talk with him and understand him personally. They even connected over the fact that they both have twin sisters and that shared understanding of how having a twin sister can create difficult dynamics for a young boy helped build deeper trust. He built a genuine rapport with my son while also setting clear and firm expectations for classroom behavior. He was gentle, encouraging, and firm which was exactly what my son needed. Over the course of the summer program, we have seen tremendous improvement in our son’s behavior and attitude toward school. Most importantly, he has expressed interest in transferring to Challenger Sunnyvale. I have always told friends that one of the best ways to evaluate a school or daycare is to observe how your child reacts. If a child is constantly crying and asking to be picked up early, that may be a concerning sign. But when a child does not want to leave at pickup time and even asks to attend the school permanently, it speaks volumes about how happy, supported, and engaged that child feels. The fact that our son is asking us to transfer him to Challenger Sunnyvale says everything about the wonderful way the teachers, staff, and administrators care for and guide their students. We are extremely thankful for the positive experience and strongly recommend this school.
• AF

  Alireza Fathi

  Jul 8, 2026
  1.0
  Our daughter has been going to Challenger Palo Alto for two years and she had a fine experience. We signed her up to Challenger Sunnyvale for summer but she had such a bad experience that she would cry every morning begging not to go to school. So we ended up not going through the whole summer.
• WM

  Wei Mi

  Jun 3, 2026
  5.0
  Our son just finished 5th grade, and we are sad to leave (Decided to transfer to a school with high school, so avoid switching school for middle->high). We really wished Challeger could have its own high school. We joined during the pandemic (Kindergarten), and even then, the video lessons and live teacher interaction were excellent. Here is why this school is so special for us: Experienced Teachers: Every teacher we had was a veteran who had taught in Sunnyvale for many years. They didn't just teach facts; they shared life experiences and practical wisdom, which we really appreciated. Great Leadership: The Director keeps everything running smoothly. Academics, scheduling, and activities are always organized perfectly, creating a stress-free environment for parents. Strong Relationships: The bond between teachers and students is wonderful, and the kids form genuine friendships. It’s a respectful, caring community, not a cold pressure-cooker. Excellent Staff: The office and support staff are both incredibly efficient and genuinely warm. They answer emails quickly, solve problems fast, and always greet you with a smile. We started on Zoom and are leaving with a happy 5th grader who found his place and felt safe to grow. Highly recommend!
• YY

  Y.Young

  Apr 23, 2026
  5.0
  We’ve had a very positive experience at Challenger School Sunnyvale. My daughter joined the preschool program when she was just over 2 years and 10 months old. At that time, she could not speak English at all. Before she started, I only had the Challenger command list and taught her a few simple phrases like “stand up” and “sit down.” In less than six months, she surprised me with how much English she had picked up. She came home with so many new words, sounds, and expressions, and it has been amazing to watch her language grow so quickly. We are especially grateful to her teachers, Ms. Sunitha, Ms. Lale, and Ms. Shilpi. They are kind, patient, and caring, and they have helped my daughter feel happy and secure at school. During spring break, I placed her in a different daycare, and she told me she was happy to go back to Challenger afterward. That really showed me how comfortable and attached she feels there. I especially want to praise Ms. Sunitha. She always keeps me informed about my daughter’s day—what she said, what she did, and how she interacted with others. She shares sweet details that help me understand my child better. She also tells me when my daughter helps clean up toys and helps other children know where their things belong. Ms. Sunitha is truly a wonderful teacher and a very kind person. We are very happy with our experience at Challenger Sunnyvale and thankful for the care and support our daughter has received here.

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