Child Development


Milestones Matter in a Child's Development!

From birth to age five, a child should reach milestones in how he or she plays, learns, speaks, acts, and moves. The CDC’s Learn the Signs. Act Early resources make it easy to monitor developmental milestones from two months through five years of age. Track, celebrate and share milestones; get tips and activities to boost development; and learn when (and how) to act if there are concerns.

Track your child’s milestones with CDC’s free Milestone Tracker app!

Download it free today on iOS and Android devices in English and Spanish.

Are you concerned about how your child is developing?

Families have choices when seeking a developmental screening for their child:

  • Contact your child’s doctor and ask for a screening
  • Contact Birth to Three if your child is under age 3: (800) 305-3064
  • Contact your local community health staff: (800) 305-3064
  • Contact your local elementary school if your child is age 3 or older
  • Contact South Dakota Parent Connection for free guidance and support: (605) 361-3171


Parent Tip Sheet: Concerned? English:  How to Get Help 
Spanish: How to Get Help

Receive free SD Act Early materials to help you monitor your child’s milestones: Order Online.

An adult lifts a smiling baby into the air outdoors, with a small CDC Learn the Signs. Act Early banner in the corner.

For Professionals

CDC’s Learn the Signs. Act Early. program encourages parents and providers to learn the signs of healthy development, monitor every child’s early development, and take action when there is a concern.

Receive free SD Act Early materials to help families and providers monitor a child’s developmental milestones:  Order Online.

Please contact the CDC’s Act Early Ambassador to SD for assistance or with questions, Lisa Sanderson at lsanderson@sdparent.org, (605) 361-3171.

Featured Resource

When Behavior Is a Concern Learning Series

Understand and Respond with Confidence

Challenging behavior can feel confusing and stressful. You may wonder why it keeps happening or what you should do differently.

When Behavior Is a Concern is a free, three-part learning series created to help parents and educators better understand behavior and feel more confident during hard moments.

In this series, you will learn:
  • Why behavior is a message
  • What happens in the brain during big feelings
  • How to build safety and connection first
  • Simple tools you can use at home or in the classroom
  • How to respond calmly and teach new skills over time