| Age | Gross Motor | Fine Motor | Communication | Cognitive |
| Infant |
| 2 months | Holds head up when prone | Eyes track past the midline | Alert to soundSocial smile | Recognize Parent |
| 4 months | Rolls front to backSits when propped | Grasps a rattle | LaughsSoothed by voice | Orients towards voice |
| 6 months | Sits aloneCrawls | Reaches with handsTransfer objects | BabblesStranger anxiety | Feeds self |
| 9 months | Pulls to stand | Immature pincer grasp | Says mama and dadaWaves bye | Plays gesture games |
| 12 months | Walking alone | Fine pincer grasp | Few wordsOne step commands | Points to object |
| Toddler |
| 15 months | Stoops and recovers | Scribbles | 3-5 words | Uses spoon and cup |
| 18 months | Runs well | Stacks 3 cubes | Points to 1-3 body parts | Helps in the house |
| 24 months | Throw and kick ball | Draw a line | 50 word vocabulary50% intelligableParallel play | Removes clothing |
| Preschool |
| 3 years | Rides tricycle | Copies a circle | 3 word sentences75% intelligable | Brushes teeth with help |
| 4 years | Hops on 1 foot | Copies a square | Plays cooperatively 100% intelligable | Knows 4 colors |
| 5 years | Skips | Copies a triangle | Defines words5 word sentences | Dresses self |
| School Age |
| 6-10 years | | | Reads | Understands death |
| 11-18 years | | | Formal operationsAbstract reasoning | Formation of personality |
