Arco Iris Spanish Immersion School

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Unlocking Success with Singapore Math

As a leader in education, we prioritize excellence in mathematics education. We believe high-quality math instruction is critical to developing confident well-rounded thinkers and learners. Since 2010, our tuition free K-5 school has embraced the rigorous Singapore Math Curriculum, resulting in above-average test scores and fostering a genuine love for math among our students. 

What is Singapore Math? 

Introduced in the 1980’s by the Singapore Ministry of Education, Singapore Math is based on the nationwide curriculum emphasizing a deep understanding of mathematical concepts rather than memorization. After a successful launch, this rigorous curriculum spread and a comprehensive math curriculum was made available for schools to adopt. 


Features that make the curriculum unique include: 


  • Focus on visual understanding through pictorial representations
  • Use of manipulatives or objects to demonstrate concepts
  • Making connections between concepts
  • Foundational number sense & mental math
  • Authentic application through word problems
  • Mastery of concepts

Why Use Singapore Math? 

Singapore Math builds confident, resourceful problem solvers who can rely on a depth of knowledge that is not found in other methods. Students become adept and flexible thinkers, a skill that serves them not only in math but across all disciplines.


At Arco Iris, Singapore Math instruction begins in Kindergarten providing a solid and consistent foundation for all students to build upon, year after year. The strength of our math curriculum lies not only in its efficacy as a program but also in our teachers’ commitment to facilitating the program and their belief in the powerful outcomes. Teachers observe how students gain deep knowledge of numbers and patterns, become agile thinkers and grasp abstract concepts at a young age. Most importantly they recognize the joy and challenge of a great problem that leads to those wonderful “ah-ha!” moments. 


In a nation that increasingly admits to math anxiety or a lack of confidence in mathematical skills, we think it’s pretty remarkable that our graduates credit Arco Iris Spanish Immersion for the opportunity to go on to advanced studies in math and engineering in high school and college. 


Our yearly testing data tells the same story of our curriculum and teaching effectiveness: our students are proficient when it comes to our math and reading scores, and we are ranked as a Top 10 Best Elementary Charter School in the state of Oregon!


Let's unlock your child's full potential together! Our Open Enrollment has closed, but you may still apply by visiting our website and completing the 2024-2025 application. Space is filled on a first come, first served basis. To learn more about Arco Iris, visit or call us at (503) 372-6052.


About Arco Iris

Arco Iris Spanish Immersion is a small tuition-free public charter school providing a rich, immersive Spanish language experience and robust academics in a true multicultural setting. Centrally located off 217, between SW Portland and Tigard, we serve K-5 students in the greater Beaverton area to become bilingual and biliterate leaders of the future. We’re enrolling for Fall 2024-25.