Welcome to Mathnasium of Lake Country

Awesome environment and support - my daughter loves going here!


Mathnasium is an awesome way to get your child to both love math and be a great mathemagician. They will isola...

Stacci Barganz
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Summer Programs

Make Mathnasium Part of Your Summer Plans.

FREE Math Assessment

The best way to see if we are a good fit for your child’s needs is to visit our center, meet the instructors, and try out our program. This is not an observation session, but a deep dive assessment into your child's math needs with a grand tour of our amazing Mathnasium center. Our meeting will give you and your child a sense of who we are, what we do, and how we can help.

Schedule Free Assessment

Contact us

Lake Country

  • 600 Hartbrook Drive
  • Hartland, WI 53029
  • Call (262) 287-0937

Click here to schedule an Assessment now!
Or click here to have us contact you!

Check out reviews from real parents at Mathnasium of Lake Country!

Hours of Operation

Instructional Hours

Mon 3:00PM - 7:00PM
Tue 3:00PM - 7:00PM
Wed 3:00PM - 7:00PM
Thu 3:00PM - 7:00PM
Sat 10:00AM - 2:00PM

Office Hours

12:00PM - 3:00PM
12:00PM - 3:00PM
12:00PM - 3:00PM
12:00PM - 3:00PM
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Hello! I'm Marian de Almeida, Center Director at Mathnasium of Lake Country, your neighborhood math-only learning center in Hartland. We help kids in grades K-12 understand math by teaching the way that makes sense to them. We provide proven, effective, and FUN math tutoring to students in elementary, middle school, and high school.

We specialize in math-only instruction with a focused, caring, and fun learning approach that delivers results.
We proudly serve local communities and schools, including:

  • Hartland, Pewaukee, Oconomowoc, Waukesha, Merton, Delafield, Nashotah, Chenequa, Sussex, and the surrounding communities
  • Arrowhead High School
  • Hartland Lakeside School District (Hartland North Elementary, Hartland South Elementary, North Shore Middle)
  • Kettle Morraine School District (Cushing Elementary, Dousman Elementary, Magee Elementary, Wales Elementary, Kettle Morraine Middle & High)
  • Pewaukee School District (Horizon Elementary, Pewaukee Lake Elementary, Asa Clarke Middle, Pewaukee High)
  • Swallow School District

Dedicated to providing the best instruction

Our instructors are enthusiastic about math and specially trained in the Mathnasium Method. They create a caring and encouraging environment where your child will learn and thrive!

Meet the Team gallery1

Instructor Spotlight

Marian de Almeida
Hey there! I'm Marian de Almeida, Center Director for Mathnasium of Lake Country. I've come all the way from Gaithersburg, Maryland, and I am so excited to bring my 8 years working with kids and teenagers in the mental health field, to the educational realm! I bring a wealth of experience in sup(...)



One-on-One Assessment

Our unique assessment pinpoints what each child already knows and what they still need to learn.


Customized Learning Plan & Goals

Our detailed plan takes your child step-by-step from where they are to where they need to go.


The Mathnasium Method™

Our proprietary curriculum and teaching method fosters skills that take hold and build upon one another.

Latest News & Posts

Fun Ways to Celebrate Pi Day (3.14)

Mar 14, 2022 | Lake Country

Why do we make such a big deal out of pi? Because pi is a big deal. This irrational number that begins with 3.14 and goes on forever helps us understand so much about our universe. We first learn about pi when measuring circles, but pi is also used to tal..

The Month of Giving at Mathnasium

Dec 12, 2021 | Lake Country

It’s no secret that we have a pretty stellar Rewards program at Mathnasium! As students make progress on their customized math learning plans, they earn Rewards Cards that can be redeemed for items both small and large ranging from snacks, Squishmallows a..

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"Kids love it"

— H.B.

Lake Country

600 Hartbrook Drive

Hartland, WI 53029

United States